• Canonical (the makers of Ubuntu) acquired Golioth, meaning Chris is moving from a 12-person startup to an organization of over 1,200 people
• Dave found this chart of Canonical products on wikipedia to be useful
• An increase in professional travel from zero weeks to six weeks per year following the acquisition, including “sprints” in cities like London
• The naming convention for Ubuntu releases (Year.Month) and the importance of Long Term Support (LTS) versions for backporting security vulnerabilities
• Ubuntu Core’s role in embedded Linux devices, utilizing an immutable kernel and “snaps” for field update
• Dave believes he influenced the Emergency Situation Surcharge at DHL after asking why it is still happening
• Dave’s transition to a “Hipster Dave” persona, complete with a secondhand Mac and a goatee
• The implementation of OpenClaw, a scripting service that interfaces with LLMs to act as an “automated intern” for repetitive administrative tasks
• Chris really likes this video showing how to use OpenClaw
• Using OpenClaw to automate forum registration approvals to combat high volumes of bot activity
• The security implications of AI agents, emphasizing that they should be treated like interns with limited access to sensitive data and separate accounts
• ARM released its first physical server chip, measuring approximately 70mm, marking a shift from a pure IP company to a hardware competitor.
• The Super Micro CEO smuggling scandal, where the founder was accused of smuggling $2.5 billion worth of Nvidia chips.
• The Cyber Resilience Act (CRA) and its requirement for nearly all CE-marked electronic products to be updatable by December 2027.
• Potential impacts of the CRA on one-time programmable (OTP) devices and the necessity of maintaining firmware support for five years post-product life.
• SpaceX’s plans for a “Terafab” a manufacturing facility ten times larger than a Gigafactory designed to verticalize the entire supply chain from silicon wafers to final packaging.
  • Editor’s note: despite cool tech stuff happening, Elon is…so lame.
• NASA’s cancellation of the Lunar Gateway project in favor of a direct path to establishing a moon base within the next five to seven years.
• Pop culture recommendations including the series For All Mankind and The Expanse, along with the book Delta V.

The post #720 – Hyper Growth and OpenClaw Interns first appeared on The Amp Hour Electronics Podcast.

Alex is founder and CEO of Efficient Power Conversion, a leading manufacturer of GaN MOSFET’s.

Alex is also the inventor of the original Power MOSFET and HEXFET at International Rectifier.
Also, former CEO of International Rectifier (founded by his father!),
https://epc-co.com
We cover everything from inventing the power MOSFET on his first day on the job to silicon physics, AI data centres and humanoid robots. Enjoy.

The post #719 – Inventing the Power MOSFET with Alex Lidow first appeared on The Amp Hour Electronics Podcast.

• Chris will be having a meetup in London March 8th, 2026 click here for more info. He will also be at Embedded World the following week at various events.
• Dave is also headed to a meetup in Sydney that he has presented at in the past.
• The “lazy man move” for meetup organizers: scheduling events within walking distance of home to simplify travel logistics.
• Chris provides details on his latest high-density hardware project, a 22mm circular board packed with 0201 components, Bluetooth, and a suite of sensors, noting a move from BGA to QFN for better assembly reliability.
• There is significant skepticism regarding “solid-state transformers” and tech articles claiming they will replace the traditional power grid, with the hosts citing efficiency losses that become massive at megawatt scales.
• A fascinating look into global supply chains reveals how a single AI prompt can be traced back through layers of manufacturing to sugarcane fermentation and high-purity quartz mines in Spruce Pine, North Carolina.
• The creeping normalization of biometric face scanning in public spaces, from water park lockers to international airport terminals.
• The marketing tactics behind Donut Lab’s solid-state battery claims, explaining how “independent third-party testing” can be carefully hand-picked to avoid industry standards. They want us  to talk about it like this
• The nuances of UL certification explains how companies sometimes use specific lab reports to imply broader official endorsements that do not actually exist.
• Dave shares his experience watching the show Silicon Valley with his son and discusses the “hideous accuracy” of the Australian public service comedy Utopia.
• The pros and cons of modular hardware are debated, covering the Framework laptop’s “Ship of Theseus” repairability model versus high-end gaming tablets like the Asus ROG Flow Z13.
• Dave’s viral social media quest for the best Linux distribution leads to a consensus on Linux Mint as the top choice for beginners, fueling the ongoing joke about the “Year of the Linux Desktop”.
• Recent industry news highlights the release candidate for KiCad 10 and the discovery of a three-cent Paduk microcontroller performing auxiliary functions inside Rode wireless microphones.
• Pimoroni did extreme an cooling project back in 2024 that successfully overclocked the RP2350 microcontroller to 800 MHz. We just found out about it from a post from Jeff Geerling.

The post #717 – Back on the road in ’26 first appeared on The Amp Hour Electronics Podcast.

Welcome Eric Migicovsky of Pebble!

• Pebble is back after Eric worked with Google to open source PebbleOS and he reaquired the naming rights
• Eric returns to the hardware space after 7 years, including working at yCombinator, a famous accelerator for early stage startups, and on Beeper, a cross platform app for messaging.
• While discussing the difficulties of hardware project, Chris brought up a recent post about a high wattage lamp project HN
• One thing Eric likes about hardware projects vs software is that “hardware projects can be done” as in they have a defined end state
• A more recent project is a smart ring – The Index 01.
• The non-replaceable battery is driven by the product specs, also the need for reliability
• The ring doesn’t immediately need to be in range of a phone, it syncs the memory after the fact
• Pebble is no longer a VC backed startup with a subscription model, so that changes a lot of constraints
• Initially they sold 2 million watches, and 250 million in sales
• Eric is driven by “gadgets”. He read “pen computing” and “popular mechanics” as a kid
• Consumer companies vs other types (and why Eric likes the former)
• Pebble went through different phases
• The team spent 6 months in China, designing the first consumer version and working directly with factories
• CTO of (original) Pebble, Andrew Witte, was a somewhat early guest of The Amp Hour
• How much did the China ecosystem drive design decisions?
• There was no such thing as a smartwatch factory (but are there ever now!)
• The book Apple in China is supposed to be a great read and mirrors the Pebble Experience
• We heard from Chrissy Meyer when she was on the show about working with the Apple Watch manufacturing proces
• Water proof methods codeveloping in China
• It’s an interative process of submerging designs in a glass vessel with pressure and bubbles seep out of the device at different points
• The remedy? According to Eric: “More Glue”
• Eric shares his process on a YouTube channel called Tick Talk (not to be confused with the shortform video site)
• There is a video with the CEO of SiFli, makers of the Bluetooth chip that is in the most recent Pebble devices
• One interesting feature is a custom bus to the Sharp-made ePaper-like screen used onboard
• FreeRTOS pebble OS
• What is PebbleOS?
• It’s targeted at an m33 class ARM chip and the kernel is FreeRTOS
• The bluetooth stack is nimBLE
• Eric went back and forth on whether to port to Zephyr for the Bluetooth stack and hw support from vendors like Nordic Semiconductor
• The Index 01 ring is Dialog Semiconductor (now part of Renesas) part
• One challenge is that rings have different sizes…so they mill the rings based on orders. The larger rings get an extra battery!

The post #715 – Shiny New Pebble with Eric Migicovsky first appeared on The Amp Hour Electronics Podcast.

Welcome Martin Rowe of EE World!

• Martin is a long time journalist in the electronics space, having worked at magazines like EDN, Test and Measurement World, EE World, and more!
• Kenneth Wyatt
• Concentrated vs diffuse information
• Product reviews
• Unitrend scope video
• Tek 5 series B
• Wirecutter for test equipment / parts
• Skepticism
• Webinars – 3 levels
• Martin has an HP34401A early model
• Touring T&M companies
• Littelfuse
• Martin is in the Boston area
• Boxborough has multiple EMI labs
• Article on building an anechoic chamber
• PCB East was in Boxborough now in Worcester (“Wuh – Stah” )
• International Microwave Symposium (IMS) inBoston this year
• What is driving the Boston ecosystem?
• NYU wireless
• 6G summit
• Components trickling down into the other parts of the industry
• Ted Rappaport from NYU writing a paper
• Open RAN
• 5G standalone vs nonstandalone
• Poster session
• ISAC
• Test equipment has to test everything leading edge
• 3GPP
• The impacts of satellite connectivity
• IoT still talking about LTE
• 5G modems and battery life
• Private networks
• Automation software
• The Measurement Blues song, among others
• Find him online
  • Martin Rowe on LinkedIn
  • EEworldonline
• Martin sent over some links related the things we discussed during the episode
  • 6G discussions: How things have changed. We assembled a timeline of the topics so you can see what’s come and gone
  • Nokia Bell Labs’ Peter Vetter talks 6G research Live from the Brooklyn 6G Summitd
  • Teardown: HP 8112A pulse generator – I bought this at a flea market. MIT holds these once a month April through October. I go every year to buy things for teardowns and to take photos.
  • DSL router uses parts from old phones – Heard about this from a European telecom newsletter and just had to get the details
  • The slide keyboard is back, in a 5G phone – Video interview from 2020. I mentioned the Psion Organizer. The designer of this phone used to work for Psion. He designs beautiful products.
  • Tryout: two low-cost USB inline meters and a load – My latest. This was the one where the audio in the videos seemed overdubbed. I uploaded the videos again using different file names. Seems OK now.

The post #714 – The Measurement Blues with Martin Rowe first appeared on The Amp Hour Electronics Podcast.

• Dave is back from vacation. He should have bought a Starlink mini (not as cheap as we thought) because his coverage was very poor throughout the trip.
• Space twitter
• Artemis II is going up soon (early Feb 2026)
• Billy makes artemis go up 
• Sparkfun and Adafruit are on the outs
• PJRC (and Paul Stoffregen) makes the Teensy and it is now produced exclusively by Sparfkun
• The pinout is open but the bootloader is proprietary and sold as the magic black box.
• Paul’s wrote about what was happening on the EEVblog forum
• Tim Lamb (Trash80) talked about teensy in his devices on episode 292 
• Chris modified a Tag Connect 10 pin footprint for an upcoming design
• RAM prices are wild right now!
• After following a tutorial on “Doom Coding”, Chris picked up using Claude Code
• A friend pointed out that more horizontal, open source programs like KiCad (version 10 coming soon) will have an advantage with LLMs/coding assistants over more vertically integrated tools. The vertical tools won’t be able to move as fast.
• Also in the Doom Coding exercise, Chris found an app called Terminus that allows connecting an Android device (and maybe iOS?) and getting a terminal interface from the phone using a USB-C cable in OTG mode.
• Zephyr builds in lots of capabilities
• Chris loves using Zephyr shells to build interfaces (even custom ones) to standard functions in Zephyr
• CES wrapped a week or two before this recording. The Donut lab solid state battery proposed impossible specs.
• Some engineers modified a Rivian to try and make the Cannonball Run. It was an interesting look into battery packs and what it takes to charge them fast.
• Dave and Chris took a long roadtrip to the Deep Space Network back in 2017.
• Piers Rocks has a great video about how PIOs work on the RP2xxx chips from Raspberry Pi
• The Raspberry Pi should always be viewed from the perspective of “what is cheapest”. The RP team mentioned that drove the decisions of external flash on the RP2xxx boards
• Past guest Jeff Geerling talked about some of the pricing challenges with RAM prices increasing

The post #713 – Rubber Duck Incarnate first appeared on The Amp Hour Electronics Podcast.

• Chris got back from his honeymoon to the Galapagos, see photos on the updated version of his blog.
• Dave encountered a super secret podcast location
• Before leaving on vacation, Chris went to an event mentioned in episode 708 launching a new Tektronix scope.
• The parent company has been Danaher -> Fortive -> Ralliant (now based out of Raleigh)
• Large budget events
• Don Mcmillan is technically funny
• Open Circuit
• The Way Things Work
• Discman teardown
• Neo the home robot
• Humane AI pin ‘tugging on the nerd heartstring’
• Nikola / Trevor Norton
• Auto concept cars
• Rigol MHO 900 videos, already hacked, paid hack
• EEVblog forum
• Unknown chinese fpga
• Stephen Hawes working on a PCB that can be laser cut for super quick turn boards
• Oxide and Friends podcast
• KiCon (US) 2025 Talks

The post #710 – Tugging on the Nerd Heartstring first appeared on The Amp Hour Electronics Podcast.

Thanks to our sponsor Blues this week! Visit the Blues store and use the code AMPHOUR to get 10% off your first order of a kit.

• Capacitors go pop on Dave’s audio setup, the Presonus monitors
• Ground loops causing HDMI cable sparking
• Chris was watching Jetman videos and got an ‘Is that real?’ from the kid. We find ourselves asking the same with all the AI generated video these days.
• Fight between mehdi/electroboom and walter lewin about KVL
• Arduino bought by Qualcomm! They also released the Arduino Uno Q, a single board computer running Debian that also has a beefy microcontroller running Zephyr
• Daves post on X about the purchase
• Arduino switched to Zephyr
• A new enabler of this complex mix of embedded, linux, AI, and ML is a software offering from Arduino called App lab
• Spacey
• Hardware meetup – ACES 
• Veritasium is PE owned now
• Chris will be going to a Tektronix event for new gear and past guest Alan Wolke (W2AEW) is giving a class
• Chris has been rebooting his website to follow the ideas of the Small Web
• Follow #electronicscreators on YouTube to not be subject to algorithmic steering
• Chris has been getting into gridfinity after discussing it a few shows ago.
• Altium changed their pricing again…but it might be lower? Hard to tell
• Check out the features coming to KiCad in v10
• YOLO = “You Only Look Once”, Chris learned about it from OpenMV

The post #707 – Welding with an HDMI Cable first appeared on The Amp Hour Electronics Podcast.

• Contextual Electronics is “still a thing”.
• Sydney hosted the International Astronautical Congress (IAC). The IAC is the “big space event of the year,” held annually in a different city.
• Chris noted that US space funding seems low, leading some friends to move from NASA to private industry.
• Dave recorded two walkaround videos: a 30-minute bird’s eye view using a GoPro on a pole and a physical hour-long walkaround.
• Large companies had private stands, while smaller, two-man companies had sub-booths within their country’s larger rented stand (e.g., South Africa, Germany, Poland).
• Niche companies included those selling “space connectors,” described as regular connectors sold at potentially 10 times the price to space customers.
• Australia had a large presence, with stands for the country and individual states (Victoria, New South Wales, Tasmania) hosting local niche space gear firms.
• Dave toured a new, completely mobile Mission Control facility built into a semi-trailer van. This unit is designed as a generic platform with screens, server racks, and redundant power, allowing any space company to install their own servers and operate anywhere in Australia.
• An Australian company specialized in “Space lube” (lubricants for satellites and actuators), necessary because water-based lubricants would boil off or freeze up and cause gear to seize.
• Chris has a new “quasi obsession” with the old technology of DIN rail. He is using 3D printers to mount development boards onto DIN rail to organize his desk.
• DIN rail is common in Australia and Europe for electrical switchboards and automation equipment (PLCs, power supplies).
• Dave sent a photo of “Fish Pointer’s” organized desk, which Chris identified as using “Gridfinity,” an ad hoc, modular standard popular in the 3D printing community, often associated with Zack Friedman of Voidstar Labs.
• Dave runs a Creality K1 3D printer that is networked, allowing him to control and print remotely.
• Chris purchased a filament dryer for only $42 to combat the issue of filament going brittle due to moisture.
• Dave recounted his attempt to sort 330 tins of salvaged parts (feet, spacers, grommets) from vintage test gear.
• The space industry is currently “so hot” due to private funding, unlike the “dead” industry 10 to 15 years ago.
• It is now easy to book a payload slot on a launch vehicle like SpaceX. Dave said that Firefly was actually “begging” people to put payloads on its Moonlander to help fund the mission, though that’s source unknown. It was supported by CPLS as part of NASA.
• The Commodore Corporation recently changed hands, and a consortium of enthusiasts released a new Commodore 64 Ultimate, featuring a transparent keyboard PCB signed by original designers, including Jerry Ellsworth. The appeal is nostalgia, as modern chips far outperform the 6510 CPU it uses.
• Chris bought a split, ergonomic Corne V4 keyboard (RP2040 chip) from AliExpress for $68. The key feature is working with Vial, a pleasant web serial-based app for reconfiguring key mappings. Dave stated he hates split keyboards and rechargeable keyboards that only last a week.
• Dave is installing 75 kWh of beefy outdoor battery packs (800-900 kg total) received “free” due to a government subsidy.
• He poured a new, completely reinforced concrete slab rated for over 1,500 kg to support the batteries on a flat surface, using pre-welded mesh instead of tying rebar.
• The new system includes an 8 kW inverter. Dave intends to install a changeover switch to run the house off the batteries if the power grid fails. Dave noted he mainly wants the “warm fuzzy” feeling of running his entire house on solar and batteries.

The post #705 – Psst…Hey buddy, wanna buy an Octopus? first appeared on The Amp Hour Electronics Podcast.

Welcome back Tim Ansell!

• Tim’s past appearances and previous work
  • Discussing Tomu on 375
  • Discussing Fomu on 456.3
  • Discussing the open source PDK on 501
  • Tim’s previous work at Google involved releasing a manufacturable open-source PDK (Process Development Kit), which contains the fundamental information needed to create integrated circuits.
  • Key open-source tools discussed include OpenROAD (a backend compiler for IC design) and Open Lane (an end-to-end suite turning chip descriptions (RTL) into manufacturing data (GDS)). Andreas had been on the show talking about his work on OpenROAD. Not discussed on the show but after Efabless went away, Open Lane has been replaced with LibreLane.
  • Efabless, a VC-backed startup, shut down in early 2025 due to investor disagreements. Efabless previously provided pooled manufacturing access (similar to OSH Park for PCBs) using the SKY130 process from Skywater in Minnesota.
  • A Skywater run costs $200k–$300k, which Efabless divided by 40 to reach roughly a $10k price point per slot.
• Tiny Tapeout
  • Matt Venn’s Tiny Tapeout program further subdivides the manufacturing costs, making it the cheapest way to create custom silicon, typically costing around $300 per design.
  • Tiny Tapeout lowers the barrier to entry, allowing people to “just try it and see if you like it,” similar to writing a “hello world” program.
  • The program has already processed almost 3,000 projects, demonstrating high community demand when costs are low.
  • Despite limitations, advanced projects are possible: a developer taped out a Linux capable SOC using open-source tools and the Tiny Tapeout space.
• Introducing Wafer Space
  • Tim started Wafer Space, based in Singapore, to provide community access to open-source manufacturing after Efabless ceased operations.
  • Wafer Space focuses on the GF180MCU PDK (Global Foundries 180 nm process), which is a much cheaper technology manufactured in Singapore.
  • The core offering is a low-volume production run: $7,000 USD gets you 1,000 chips back. This volume is enough for prototyping and shipping a small product (e.g., 500 units).
  • The design envelope area is 3.8 x 5 mm (20 mm squared) using the 180 nm process.
  • Interested parties should sign up via the Crowd Supply page.  The deadline for purchase is the November 28th and submissions are due by December 3rd, with delivery by March 15th.
• Manufacturing & Packaging
  • By default, customers receive bare silicon die
  • Tim is working with PCB manufacturers (like JLC PCB, PCB Way, Seed Studio) to offer Chip on Board (COB) wire bonding assembly onto custom PCBs (think black epoxy blob on a PCB)
  • COB packaging is significantly cheaper (sub-$2) than standard packaging houses (which often charge around $7 per chip).
  • This approach also provides faster iteration speed, as PCB manufacturers offer quick turnaround times (sometimes 3 days) compared to typical packaging houses (3 months)
• Getting Started & Resources
  • If you are new to chip design, starting with Tiny Tapeout’s click and drag tools is highly recommended. Matt Venn previously talked/sang about Siliwiz
  • More advanced tools include Verilog and VHDL (coding style) or KLayout and Magic (drawing shapes, similar to PCB design).
  • To follow the project or seek help, join the Wafer Space Discord
  • New services offering open-source silicon manufacturing include IHP (Europe/130 nm) and Chip Foundry (US/Skywater), increasing ecosystem resiliency.
• Website: Wafer.space
• Sign up on the CrowdSupply campaign

The post #703 – Building wafer.space with Tim Ansell first appeared on The Amp Hour Electronics Podcast.

• Dave bought a lemon laptop
• Chris officially has solar that is installed, working, and is effectively an appliance at this point…
• Duke Energy and North Carolina nuclear mix
• The impact of batteries on the grid
• The Duck Curve is something Chris and Ari discussed on ep650
• Open circuit voltage on panels
• Dave did a repair on a tennis ball machine
• Chris designed a board with test points too small
• Accupuncture jbc
• High cost vs low cost rework tweezers
• Nanofix YouTube Channel
• Tested
• Ugly multimeter review

The post #702 – Test Point Accupuncture first appeared on The Amp Hour Electronics Podcast.

• Dave is starting a new project for a lab timer called the uTimer
• Timelapse
• Geerling videos about clocks
• Mitxela clock
• Transflective displays
• Dave is looking at LCDs like this one
• Dropping Rs vs Ls
• Font chip
• .5mm pin pitch on the connectors
• Chris is making a new breakout board that is effectively a sensors shield for a Bluetooth chip. It’s the first time he’s using the service and it was a pleasant completely hands-off experience.
• Mike Harrison USB C barrel jack
• JLC DFM plugin for KiCad
• Python script to pull EasyEDA parts into KiCad
• Chris is designing around this $3 board with an nRF52840A
• de minimus tariff exemptions are gone in the us
• North Korea is putting forward software engineering candidates that are actually teams of workers
• Mini PC production at BeeLink
• Stephen Hawes on The Amp Hour
• Stephen documented the process of getting the Opulo v4 through certification
• Chris has solar install issues
• Dave is dealing with removing downpipes
• Dave is getting battery extension 50 kWh

The post #700 – Beware of the Overachievers first appeared on The Amp Hour Electronics Podcast.

Welcome Matt Brown of Brown Fine Security!

• Matt has been reverse engineering a “smart” smoker controller that talks back to AWS IOT
• Jeff Geerling talking about his dishwasher
• Storing private keys on the device??
• Threat models
• Key rotation
• What is the best case scenario for an IoT device?
• Secure boot / trust zone
• Keys encrypt flash storage
• Chris has designed in the ATECC608 before
• Replacing Certificate Authority (CA) cert in grill firmware
• Matt has a Linux hardware / reverse engineering background
• Flash is always external
• Ghidra / idapro / binwalk
• Security cameras are 99% linux based (battery based cameras might be embedded)
• Best practices
• Encrypted firmware
• hidden uart / jtag
• Keys
• Are linux devices “worth more” to a security researcher?
• CVSS risk scoring system
• Attack vector
• Vulnerabilities are better if it can be a remote executed
• Linux devices have more compute
• Bluetoothe LE
• Ability to enumerate
• Scale reverse engineering
• Chris has discussed the silliness of a bluetooth toothbrush on the show before
• Tools / Software of the trade
  • xgeku firmware reader
  • picoemp
  • PCBite
  • Saleae
  • SDR USRP B200
  • Universal radio hacker
• Stick-to-it-ness
• Matt just came back from hardwear.io, one of his new favorite conferences
• Find Matt at the embedded systems village at DEF CON
• Follow Matt via his YouTube channel
• Matt has a new IoT Security newsletter starting up

The post #698 – Hardware Security with Matt Brown first appeared on The Amp Hour Electronics Podcast.

• Dave found a wrist mounted DMM that looks…inadvisable
• We’ll discuss the survey results next time!
• Florin Cocos of VoltLog
• Great Scott
• Sam Aldaher on the show last week
• Gerald Undone did a studio tour with Captain Disillusionment
• Short videos
• Dave using a go-pro on a bike
• Separate gyro file to stabilize
• D-y hybrid inverter
• Chart
• Remote shell
• Cline
• Chris is finally getting solar
• open energy monitor
• Emporia vue
• Sense
• We talked with Joe Bamberg when he worked there

• Driving back from canberra
• Ben Krasnow makin’ magnets!
• Bluetooth videos

The post #696 – It Works With Option Number 5 first appeared on The Amp Hour Electronics Podcast.

Welcome Sam Aldhaher, power engineer and 3D graphic artist!

• Sam has always been interested in art…and power engineering
• He primarily works in Blender and has been for 5-6 years
• Inputs and outputs
• Starting from Altium / KiCad for eCAD
• Blender doesn’t accept step files, it works with meshes like STL
• KiCad -> Blender is a good flow, as there are add-ons to import KiCad
• Making a good visulalization is all about lighting, materials
• Building library of models
• Modeling magnetic fields
• Research in wireless power
• openEMS vtk format
• The marjority of tooling is glued together with python
• ElectroMag Nodes – Sam‘s tool – $1
• Right hand rule
• Developing intuition
• Elmer finite element solver
• Past guest Katerina Galitskaya also visualized RF and talked about the differences of testingi n a chamber vs building a visualization
• FastHenry is inductance tool that was created in 80s at MIT for wirebonds. Didn’t have a visualization front end, like SPICE
• 3D whiteboard
• Using Blender to prototype and then taking it to other tools (CST, Ansys)
• Validating on the bench with an impedance analyzer
• Simulating power loss is difficult
• Quality factor
• “CAD is too perfect”
• Adding surface imperfections
• Node system is similar to simulink, adding blocks (Chris also thought this sounded like the effects in Davinci Resolve)
• Lighting
• Making the background dark means you don’t need to have far field details
• Tutorials
• Blender Guru – how to make a donut
• Sam’s video about how to draw components on a PCB in Blender
• Doing the same with Geometry nodes in Blender
• Ability to create things procedurally
• How to create ICs in Blender
• Using LLMs for python glue code
• What is a shader?
• HardOps tool, simplifies workflow (shuffle button)
• Visualizing an Inverted F antenna in Blender
• Remembering that videos are just still frames in order
• Electric fields propagating on the antenna itself
• Radiated electric fields (red and blue and black)
• OpenEMS generates GBs of data
• Blender geomtry goes out to OpenEMS so it’s geometrically linked
• What if it was a ceramic antenna instead of a metal inverted F?
• Simulating 60 GHz from a radar chipset
• Meshing – sample points in space
• simulating points in time
• Impacts of stubs / squares on microwaves
• Human Hand Interaction with 60GHz Electromagnetic waves
• SAR simulations – how much heat do you generate
• Simulating motor windings on a PCB
• The above was a collaboration with past guest Carl Bugeja
• When to switch from near field (electro) vs far field (openEMS)
• Calculating values with inductance calculator
• FastHenry tool on Github
• Sam’s work on artstation
• ZS smart watch

• Fast track if listeners want to get better at this art
  • Learn blender – donut
  • KiCad -> Blender reference
  • Play with geometries nodes (ElectroMag Nodes, Fast Henry)
• Find Sam on social
  • LinkedIn
  • Twitter/X
  • YouTube
  • Instagram
  • EEVblog forum

The post #695 – Making The Invisible, Visible with Sam Aldhaher first appeared on The Amp Hour Electronics Podcast.

We are doing a 2025 listener survey! Answer the survey and put in your email to win one of three Jumperless OG units donated by Kevin Cappuccio (past guest of the show). Last day to input is June 1st.

This episode was recorded Monday the 12th, which has implications on discussions.

• Dave recently returned from Melbourne for Dave’s recent visit to Electronex.
• Dave saw past guest Scott Williams there (he has been interviewed by both Dave and Chris). Scott’s company Xentronics is also a Golioth partner
• They discussed service providers in the electronics industry at including turnkey solutions (concept to production and marketing) versus services only (firmware, PCB layout, CAD).
• The choice of show for a service provider might depend on the customer vertical (e.g., medical expo for medical device design).
• Farmers are described as rough clients due to being cost-constrained, needing durable solutions for harsh environments, and being unforgiving of downtime.
• The Australian Manufacturing Week was unexpectedly enormous, dwarfing the electronics show in scale and attendance, with lines up to 40 minutes long just to get in.
• The manufacturing show featured “Heavy Metal” manufacturing, like laser cutters, sheet metal benders, and giant machines cutting thick steel, which Dave found more exciting than the electronics demos.
• They discussed the scale of manufacturing equipment, comparing it to shows like IMTS in Chicago with multi-story machining centers and machines weighing hundreds of tons.
• Australia manufactures things like steel, large steel structures (bridges), and large custom parts like excavator scoops.
• Dave is conducting environmental air quality tests in his office, measuring formaldehyde, CO2, and other factors. He has to run his air conditioning for one of the test conditions.
• The environmental monitor measures temperature, pressure, humidity, VOCs, noise, carbon dioxide, formaldehyde, PM2.5 particulate matter, and radiation. The radiation sensor uses a tube requiring 381 volts.
• XKCD graphic showing relative radiation
• Dave observes large formaldehyde spikes every time he opens his door, which go down within about 10 minutes. His CO2 levels are typically 800-900 ppm.
• The AC unit cycling is visible in the humidity measurements.
• Chris asks about the availability of affordable VOC sensors now. Dave believes his monitor uses a common sensor like the BME680.
• Chris explains that the availability of affordable VOC sensors is linked to FEMA trailers after Hurricane Katrina, where high formaldehyde levels caused illness, leading to regulations and subsequently more affordable sensors. Modern VOC sensors often measure gas resistivity in ohms.
• Some PM2.5 sensors use a fan and a laser to detect particles.
• Dave saw small desktop lathes at the manufacturing show and was tempted to buy one for $800.
• Chris explains the difference between a mill and a lathe. Potential uses for a lathe are discussed, including making knobs.
• Chris advises against buying a personal machining tool like a lathe or mill unless you need parts immediately, suggesting using online services instead, as getting $800 of value from occasional use is difficult.
• Dave jokingly suggests a lathe might be useful for “zombie apocalypse manufacturing”, or more darkly, for making gun barrels.
• Chris mentions his past experience with a mill, which he traded for a 3D printer kit. He now prefers “it just works” solutions.
• They discuss receiving free 3D resin printers and the difficulty of finding uses for them unless you are already skilled in 3D modeling.
• Discussion shifts to the recent drop in tariffs between China and the US. Dave believes this will lead to lots of manufacturing coming back to the US, citing announcements from car companies and others (but providing no sources). Chris found this CBS article after the fact, but it’s light on details.
• NPR covered how tariffs are impacting Digikey and Thief River Falls
• Chris is skeptical that the tariff drops or initiatives like the CHIPS Act will cause significant, long-term shifts in the global supply chain, especially for components like capacitors or packaged semiconductors.
• The complexities of building fabs and the long lead times are mentioned in relation to the CHIPS Act.
• Chris recommends a YouTube channel about shipping and logistics and mentions MarineTraffic.com for tracking live global shipping data.
• Dave mentions issues with Bluetooth data dropouts and incorrect values on a new Brymen BM787 multimeter.
• Dave recently made a video about Test Controller, a free Java-based program that automates hundreds of test instruments (multimeters, power supplies, loads) via serial interfaces. It allows scripting and custom driver creation.
• Dave considers using Test Controller and multiple instruments with his microscope PC for overlaying data on video.
• Chris introduces the concept of “vibe coding,” which means letting AI do the coding. You act as a product manager providing requirements and feedback.
• Dave has used AI for coding before and is interested in using it for his next project due to infrequent coding leading to needing to relearn tools. He suggests using it for a simple timer project, especially for annoying tasks like generating fonts.
• Chris is using AI for a location-sharing web app prototype for a meetup. He describes the experience of watching the AI modify files and interact with tools as “trippy”. He uses “Claude credits” for this.
• They discuss AI as a new tool. Chris expresses concern about how students learning to code today will develop troubleshooting skills if AI does much of the basic work.
• Dave received a new piece of high-end test equipment: a Microtest Impedance Analyzer (model 6632). This is distinct from an LCR meter and can measure the entire frequency impedance sweep up to 10 MHz (for the model received).
• The impedance analyzer can be used to characterize components like PCB inductors, assess bypass capacitor performance on boards, or measure materials like piezoelectric substrates. It can also show admittance circles and DC bias characteristics.
• Chris mentioned that past guest Carl Bugeja would benefit from a tool like the impedance analyzer
• Dave notes the impedance analyzer is very specific and requires special fixturing. It supports open, short, and load compensation.
• Dave also recently received a heavy GW Instek AC power source, which can be used for power line simulation (adding spikes, dropouts, etc.) to test products.

Trying out generating show notes using NotebookLM from Google. We’d love your feedback in the comments.

The post #694 – Voltage, Vibes, and VOCs first appeared on The Amp Hour Electronics Podcast.

Welcome back Dr Colin O’Flynn of Dalhousie University and New AE tech!

• Colin has been on the show twice before
  • Episode 239 in 2015
  • Episode 552 in 2021
• Colin continues to publish/do research around side channel attacks
• Now he’s targeting different ports / Jitter measurements
• JTAGulator
• RF Mixer
• Side channel with power
• Can you fix it on a chip?
• Targeting an SD Card port because there’s a clock
• Other clocked things like displays / RF
• State of hardware security
• RPi episode (RP2350)
• OpenTitan 
• Root of Trust
• Episode with Laura Abbott from Oxide
• Open vs closed about security
• Guidelines for what to care about like in the ARM PSA
• UK gov’t
• Lowrisc Sonata System
• CHERI / CHERIot
• Secure / non-secure
• Artix 7 FPGA
• Mouser bonded area
• Pick and place experiments
• Charm High / Neoden
• Failing on fast turn
• Person running production
• Recovering from Covid shortages
• Airtag teardown
• ESP32 HCI supposed vulnerability (and response)
• Colin is writing a book about small scale production
• Sign up to learn more about the book when its available!
• Students “Kids these days”
• ChatGPT in the classroom
• Check out Colin’s blog for more info!

The post #693 – Small Scale Electronics Manufacturing with Colin O’Flynn first appeared on The Amp Hour Electronics Podcast.

We are doing a 2025 listener survey! Answer the survey and put in your email to win one of three Jumperless OG units donated by Kevin Cappuccio (past guest of the show) Note: this was corrected from the original, these are not v5 units, they are the original Jumperless units. Apologies for the confusion ~CG

• Chris signed on to get solar installed
• He’ll be taking advantage of Duke Energy’s PowerPair, a program to get a bulk amount for the battery and ongoing payments to act as a virtual power plant.
• Telsa Powerwall 3 Teardown
• Australian politicians are proposing money for batteries for everyone in Australia
• Peter Walkinson batteries
• CATL batteries
• Back powering off a Chevy Bolt
• AC battery power
• Peaker plant
• Check out the rates for peak power in New South Wales (high!)
• Base load
• Chris is working on a new series for tiny hardware
• nRF52840
• With careful planning, it’s possible to get a “0.4 mm pitch” (found out it’s actually 0.35 mm!) onto the JLC 6 layer process because they now allow via in pad.
• Jumperless v5 episode (though as a reminder, we’re giving away the OG versions, not the v5)
• Dave review of Jumperless (mailbag video)
• We are doing a 2025 listener survey and added some new questions
• Slow trigger 
• R&S version 
• Laminated cheat sheet
• Jeff Geerling Bosch video 
• The Tariffs in the US are an absolute mess. Since recording they have been downgraded, but they are definitely still going to have some outsized influece on the electronics world.
• Chris thinks that it makes more sense to race to the bottom of available parts (like the new $0.10 CH572 with Bluetooth), pay the tariff, and put in more time and effort on the software. Not that Chris is the intended audience, but also that it’s not going to have the effect that is
• Ghostbusters song

The post #692 – Like a steam engine in your house first appeared on The Amp Hour Electronics Podcast.

• Meetup.com doubled their prices so the 3H Triangle group moved to Luma (same is true for SF, Seattle)
• Note taking apps after Evernote was gutted: Joplin, Obsidian
• Battery leakage in a DMM
• Causes of leak
• The PCB of a Tonie box with an SD card glued in place. Board has an ESP32-S3. (Product page)
• Design decisions – Latched / unlatched EEVblog video
• Pulse stretcher
• 3rd mode ‘break on open’
• Chris is working on a design inspired by the Apple AirTag
• Golioth just launched Bluetooth support (recorded prior to this announcement)
• It has an nRF52840 and NFC onboard, with a bunch of sensors.
• It won’t work with FindMy
• nroot tag
• Linus video about M4 Mini
• Jeff Geerling talking about storage
• MKBHD iPhone16e
• NTN
• Keyfinders 
• The Clapper
• SAW filters
• Dave’s talk at UNSW (months ago)
• How did you learn about oscilloscopes without the internet
• AC power issues – brownout? need to scope power
• Scale of electricity

The post #690 – Clap on, clap off, lights flicker first appeared on The Amp Hour Electronics Podcast.

Welcome Kevin Cappuccio, creator of the Jumperless Breadboard (v5 and before)

• Check out the Jumperless v5 on Crowd Supply
• OG Jumperless Video
• This update shows a bunch of images with the breadboard off
• 3M whitelabels their breadboards (because of the adhesive?)
• Breadboard spring clips
• Spring clips (in 3D)
• Elecrow
• 369
• CH446Q, a clone of Zarlink MT88161
• FPAA
• Resistance of the traces
• BSky
• Schematic
• CLOSS network
• Power Op Amps
• +/- 9V supply
• Or just all the parts laid out in one pic
• Layers/routing
• Probe circuit
• Bus Pirate adapter
• Raspberry Pi adapter
• Interface
• Full color WJP 3d printing (and on X)
• Zephyr shells
• You can still buy these on CrowdSupply
• Repos
  • https://github.com/Architeuthis-Flux/JumperlessV5
  • https://github.com/Architeuthis-Flux/Jumperless
  • https://github.com/Architeuthis-Flux/breadWare
• Follow Kevin online
  • Bsky
  • Mastodon
  • Discord

The post #689 – A Jumperless Breadboard with Kevin Cappuccio first appeared on The Amp Hour Electronics Podcast.

• Tracking test equipment on one long homepage…the emporer of test equipment
• If you track it, it’s not hoarding…it’s curation
• Very specific piece of junk wood
• Garage
• Solar
• Amber allows you to sell power back in Australia at some wild rates
• Dave is trying out case design in OpenSCAD…it looks…ok
  • 
• Pebble is returning to the world after Google open sourced the OS (kudos)
• Andrew Witte, former CTO of Pebble, was a guest on the show
• Tandy200
• Annie Lennox on the train with her Tandy (see cover image)
• Capacitive forming / reforming
• Electric Dreams
• Multimeter repair
• Tandy teardown

The post #688 – The Tandy Train first appeared on The Amp Hour Electronics Podcast.

Welcome James Adams, Chris Boross, Liam Fraser, and Luke Wren!

• The last time the RPi team was on the show was about the RP1 (#648)
• The order of parts being released was RP2040->RP1->RP2350
• Check out the datasheet for the RP2350
• Learning from silicon
• Security and power states
• The part is a “Dual dual core”
• The Arm side is a Dual M33
• The RISC V side is a Hazard 3 processor, designed by Luke based on a previous processor called the Hazard 5
• HB5
• There is a mux on the core and you select which side you’re going to use at boot
• There are 48 GPIO (but users always want more)
• Chris Boross (first time on the show) is on the commercial team. He’s seing interesting applications for the RP2350 including devices that are using it for motor control.
• They also have seen the part used in satellites because mRAM or masked ROM is less susceptible to radiation errors
• The PIOs have changed, but are more evolutionary from the RP2040
• The PIO allows you to create state machines that process inputs without processor interventions, basically like tiny cores
• 2 cores – 8 total
• Interesting PIO applications
  • Luke still likes that DVI on 2040 that was discussed on the first episode they were on (#529)
  • CAN is possible
  • USB host / device
  • MII / RMII
  • ULPI – USB 2.0 Phy
• The core frequency only increased 133 MHz -> 150 MHz. There is tougher timing with the M33
• LVT – lower voltage threshhold
• 30 -> 40 pins
• There are now variants listed on the RP2350 product page (but not in mass production) that include flash in the SOM package
• RP2040 was one power domain
• “Powerman” (and of course AVR Man)
• Switched core
• AON – always on
• 32 kHz
• There is a C/C++ SDK that is the basis for other ports
• Security is a focus for the RP2350
• Bootrom in every chip
• Secure boot
• M33 features – secure / non-secure
• RISC V PMP
• RCP – Redundancy Coprocessor
• Raspberry Pi had a challenge / bounty for getting the secret out of the RP2350 OTP with secure boot
• One of the few silicon companies doing this sort of thing in public
• Past guest Aedan Cullen  was one of the hacks called “Hazardous threes”. He gave a talk about it at 38C3
• Past guest Colin O’Flynn was also mentioned because collaboration around side channel attacks with the Chip Whisperer
• IOActive used a FIB – Fine Ion Beam – and passive voltage contrast to capture an impressive image of a decapped chip (see the RPi post)
• “Never want to see ‘novel technique’ in an email”
• Improving the RP2350 silicon
• How do you decide what to fix/leave?
• Can it be changed in metal/vias?
• SIO spinlock not being fixed
• Chicken Bit
• Filler cells are reprogrammable and help with fixes
• It costs approximately $50K per layer to change (ostensibly because of the high costs of masks)
• ULA – uncommitted logic array
• Die shrink doesn’t seem to make sense
• Will keep making each chip as long as 40 nm fabs are around
• Thinking about the RP2040
• The easiest way to get started is to use a Pico (RP2040) or a Pico 2 (RP2350). Both have connectivity options as well.
• Raspberry Pi is now a public company! Doesn’t change much other than the business scrutiny.

The post #687 – The RP2350 with the Raspberry Pi Team first appeared on The Amp Hour Electronics Podcast.

Welcome, Stephen Hawes!

• Chris interviewed Stephen back in 2020 for his second episode of The Contextual Electronics Podcast. It was when Stephen was still working at Formlabs and the Lumen/Opulo were a glimmer in his eye.
• The Lumen v4 is a Benchtop Pick and Place machine that works with OpenPNP
• Where are we in relation to reprap?
• Powered feeders
• Videos about eeprom
• KiCad pos file
• Can reliably place 0402
• Lumen v4 product page
• Motherboard of v4
• Running Marlin FW
• Head has two heads/nozzles
• Compare the Lumen to other methods (hand placed, paying for assembly)
• OHM (Open Hardware Manufacturing) podcast
• What industries are open?
• Thea Flowers (of Winterbloom synth fame) just joined the team
• Microscope
• Other tools
• Space constraints
• Stephen does a great job talking through many experiments and upcoming features on his youtube channel
• Prototyping PCBs with a fiber laser 
• Micronix
• Making PCBs on a 3D printer (hack session with Stephen’s former employer)
• Timon (Skerutsch) makes double sided PCBs by inserting enameled wire through drilled holes

Is this the year you should get a Pick and Place? Stephen won’t say yes (but I will)

The post #686 – A Benchtop Pick and Place with Stephen Hawes first appeared on The Amp Hour Electronics Podcast.

• Home assistant
• Homelab subreddit
• Solar assistant
• proxmox
• CarPlay / android auto
• NUCs
• Video Interview with Lee (since posted as #684 of TAH)
• 25K pound amplifier repair and associated EEVblog forum post
• Louis Rossman also talking about the copyright claim
• How the Fairlight CMI changed Music
• Read more here
• Synths / woodworking are hobbies that will eat all free cash flow (and Chris is considering the latter…)
• Pat Gelsinger has stepped down / retired / been forced out at Intel
• Intel will now have co-CEOs. As past guest Luke Wren wrote on Mastodon, “Based on historical trends I predict the number of Intel co-CEOs will double every two years“
• Startup in Ohio will apparently be making Quectel parts for the US market. We expect to see lots of silliness like this in the next few years because of forthcoming tariffs…

The post #685 – Data Provenance in the Home, Server, and Fab first appeared on The Amp Hour Electronics Podcast.

A full 3 hour discussion with the legendary Lee Felsenstein, designer of the Osborne 1, SOL computer, VDM-1, Pennywhistle modem, and the inventor of social media. Covering everything from the Berkeley free speech movement, the counterculture movement, his career, through to Obsorne and how he invented social media with Community Memory.

His book: https://www.amazon.com/Me-My-Big-Idea…

https://felsensigns.com/

00:00 – Full 3 hour talk with Lee Felsenstein
08:24 – University of California at Berkeley, and the Free Speech Movement.
29:04 – First Junior Engineer job at Ampex
36:20 – The first hackathons with Richard Greenblatt
37:33 – Hackers, Heros of the computer revolution
1:03:36 – Techical career at Ampex
1:12:52 – Atari Computers and Steve Jobs, Nolan Bushnall, and Allan Alcorn
1:15:00 – He tried to pitch social media to Steve Jobs
1:22:15 – Designing the Pennywhistle 103 modem +
1:25:36 – Marty Spergel selling kits
1:31:53 – Steve Wozniak and how the Apple 1 is NOT a personal computer
1:43:42 – Osborne Computers
1:53:22 – Osborne 1 physical design
1:57:57 – Osborne 1 development timeline
2:01:19 – The Osborne Effect wasn’t what killed the company

The post #684 – Lee Felsenstein: The Computer Revolution & Counterculture first appeared on The Amp Hour Electronics Podcast.

• AI tools for helping with coding (but NOT layout, amirite)
• Troubleshooting as a skillset
• Stick meme
  • 
• Dave got an updated electrical box
• Home assistant
• Keith Burzinski episode (ESPhome)
• Toothbrush show
• Andreas Spiess discussing Bluetooth proxy
• Ian Scott Johnson DIY home automation
• Electrarc240 reviews every element of a linear power supply
• India power cables
• Buried cables
• Spotify is bricking the Car Thing but others are trying to save it
• “injurnear”
• Chris recently developed and coded up a cellular connected relay board for a Smart Locker application

The post #683 – Troubleshooting is the skill first appeared on The Amp Hour Electronics Podcast.

• Chris has been troubleshooting a PCB with a dead short on inner layers (put in by board house by mistake)
• Don’t Touch My Gerbers shirt
• “Is there an AI tool that will fix this for me?” … No
• Chris dumped a bunch of current in the board and looked at it with this thermal camera
• 6.5 digit DMM to track down shorts
• Etching problems in the old days
• 100% etest
• Adding rails to PCBs for production
• Reddit discussion thread: why not work on a product? That is, Dave, the wise one.
• Videos
• Live stream issues
• Post from Twitter: Is 2 layers all you really need? This person thinks so, or is trying to convince themselves as much.
• Armchair quarterbacking
• Ian Johnston replacing the display on an 8.5 digit DMM
• Jack Ganssle has posted his final newsletter (The Embedded Muse)…happy retirement! Jack has been on the show twice:
  • Episode 54 (!)
  • Episode 489
• Ward Christensen, Inventor of BBS and XModem, (and former listener of the show!) has passed away
• Dave is interviewing Lee Felstenstein for our next episode

The post #682 – Your Mind Is The Tool first appeared on The Amp Hour Electronics Podcast.

Welcome Lukas Henkel of OV Tech GmbH, a product design firm based in Nuremburg Germany!

• Miniturization and the limits of miniturization
• Price is a constraint
• Using standard PCB tech (off the shelf)
• Open source SIP
• Steps
  • Conventional pcbs / components
  • Silicon inductors embedded in boards
  • Bonded Bare dies / stacked
• Need volume to make it work
• Requirements to fit into ______
• iMX8 ULP – 0.4mm CSP
• SIP Footprint
• Module abstraction layer talk
• Framework laptop
• Software support / BSP
• SIP will be different than PiMX8
• Crowdsupply campaign launching 2-3 weeks and delivery in Dec/Jan
• OpenSource laptop
• CM4 vs PiMX8
• SPI Flash with backup partition
• Secure element SE050
• Footprint for coral tpu and Halo 8
• Trying to solve the problem of vision use cases
• Marketing using layout / products but also making money on it
• Katerina show
• Visualizing simulations
• Developing intuition
• OpenEMS
• Usability is based on python scripting
• Using Blender for heat map
• BVTKNodes uses .vtk file output
• Multiphysics solvers
• Things that drive Lukas
• For HDI, Thinking in 3D / 2.5D and being able to visualize
• Layers ranging from 4 to 18
• Any layer design for SIP
• Wurth electroncis for high density “any layer stackup”
• Article series on altium for the open laptop
• Follow Lukas on LinkedIn

Lukas also was a co-founder of PCB Arts. We had his cofounder Saber on the show in the past.

The post #681 – Compact High Speed Design with Lukas Henkel first appeared on The Amp Hour Electronics Podcast.

• Starship 5 landed on chopsticks! (you know, in case you have been offline for 2 weeks)
• Dave’s EV had a stuck cable
• Portable charger is surprisingly good
• CCS Charging standard
• Fast charge 36/50 kW
• MKBHD Chevy Silverado review
• JLC is now offering silkscreen QR codes to have individually marked boards
  
  That’s the board that Chris has been designing on a livestream each week
• 1 wire UID (pioneered by Dallas, then Maxim, now Analog…le sigh)
• Dave is selling a new Bryman multimeter, the BM2257 (teardown photos)
• Chris just returned from Embedded World North America, doing a demo at the Joulescope booth
• Chris also gave a talk at the Zephyr meetup which will be released in a few weeks
• Hackaday article about their comment section and project/article feedback
• References
• Musk Sticks
• NC floods might impact the supply chain due to Spruce Pine NC being a source for quartz. We didn’t read this article, but it was a better explainer than we had at the time.
• Meshtastic objects to the proposed FCC changes

The post #680 – Catching Rockets with Musk Sticks first appeared on The Amp Hour Electronics Podcast.

Welcome Katerina Galitskaya!

• Chris started following Katerina’s antenna posts on LinkedIn
• Monopole vs dipole
• Lower frequences are harder bc longer wavelength
• PCB size half of frequency
• Place antenta on the shorter side
• How to ruin your PCB
• When to go to a antenna engineer?
• Where will the device be?
• Antenna environment
• Start from vacuum, start adding elements
• Dummies in the lab. The one in the episode photo is a dummy head filled with liquid (?!)
• SAR – Specific Absorption rate
• Simulation vs lab work (dimensions)
• Anechoic chamber
• When to go with custom antenna?
• Buying off the shelf antenna?
• New Airpods with fancy 3D antenna
• Ben’s video about laser sintered antennas
• MIMO / Beamforming
• the failed promises of 5G
• When to simulate
• Some open source programs out there (“EMSee”?)
• Simulating vs visualizing
• Most of the time it’s not about vizualizing fields
• What is the iteration elements of the antenna?
• Satellite antenna design
• Good to go external
• Thinking about the dielectric const of case
• Follow Katerina on LinkedIn!

The post #678 – All About Antennas with Katerina Galitskaya first appeared on The Amp Hour Electronics Podcast.

• Spam calls
• Keysight released the HD3, a 14 bit ADC oscilloscope (teardown video)
• Chris will be at Embedded World North America, please let him know if you’ll be there!
• Chris will be at the Joulescope stand along with former guest Matt Liberty
• This is one of the only tradeshows for general electronics in the US, Embedded Systems Conference went away many years ago. Chris, Dave, and Jeff (yesssah!) recorded at ESC in episode 41!
• Bootstrapping new conferences
• Cellular power modes
• Dave old GSM video
• PSM / eDRX
• ALT1350
• Dave got a smart meter on his home setup
• EDMI 
• EEVblog forum post about leaky power bill
• Maybe a trickle
• Chris has been trying out Meshtastic, which is based on LoRa. Check out Jeff Geerling’s video for a good overview.
• meshtastic subreddit
• People posting about airplanes flying overhead (example post) like ham radio contacts
• Meshmap

The post #677 – Watt Is The Deal first appeared on The Amp Hour Electronics Podcast.

• Chris has been moving house, which partially explains the terrible audio problems the past few episodes…
• For a lab, Chris believes in
  • Lots of wire shelving (with epoxy coating)
  • Everything on wheels (including shelving and workbenches)
  • As much storage as you can get
• Chris has been doing livestreams of hardware design for Golioth.
• The module he is designing is called the Drachm (“dram”)
• The hardware Chris has been working on for the past 2 years is now open source
• Flox video with machine learning on a camera also featured Chris
• Altium finalized their acquisition by Renesas. The price already went up (discussed previously)
• Raspberry Pi released the RP2350 while we were away
• Inductor polarity on the RPi Pico 2
• RP2350 Datasheet
• You can choose the processors you want (Dual m33, dual RISC V)
• Microchip was offline due to …. HACKERS
• Dave has been trying out a new home battery storage system
• NMC vs LFP
• Reverse cycle
• There have been lots of layoffs in tech, including 15K (!) at Intel
• Layoffs.fyi
• Being sued for a battery review? Say it aint so

The post #676 – Moving House (And Lab) first appeared on The Amp Hour Electronics Podcast.

Welcome Shawn Hymel!

• Shawn will be transitioning out Developer Relations at Edge Impulse. He will now be building courses full time. (this was recorded before Shawn announced his departure)
• He want’s to be like a Professor, which partially explains his signature bowtie
• Should people go into content? What about Developer Relations more specifically?
• New courses will include FreeCAD and 3D printing and will be published by Digikey
• Part design in FreeCAD
• 0.22 in Mango Jelly
• Learning modeling vs learning an actual program
• Scoffolding
• Making a Zephyr course
• Zephyr / Golioth training
• Ecosystem vs RTOS
• Workshop at Harvard
• Trying to train on hardware
• What should engineers know about ML
• Andrew Ng’s course on Coursera
• Updated for NumPy / Python
• Understand Neural Networks
• Can treat them as a black box
• More important to understand statistics and data science
• Hot dog / not hot dog (silicon valley)
• Model zoos
• Hugging Face
• Coprocessing on U55 – U85
• ToorCamp
• Michael Cheich
• Robert Ferenec
• Marketing courses
• Running
• You can find Shawn as ShawnHymel on most social
  • Twitter
  • LinkedIn
  • Mastodon
  • Bluesky
  • TikTok
  • Instagram
• You can also check out his site, shawnhymel.com

The post #675 – Changing Course with Shawn Hymel first appeared on The Amp Hour Electronics Podcast.

• Murphy
• More efficient with cooled panels
• Battery storage solution
• Server rack batteries
• Chris has been doing hardware Livestreams
• Geofence
• n8n, Similar to Zapier, IFTTT
• Home assistant
• EE Grad wants some insight on new tech
• https://4dsystems.com.au/
• Scott Williams of Xentronix recorded with Dave and then Chris
• Saw at Electronex
• My Cousin Vinny
• Embedded World North America is happening in Austin in October. There is a vendor map now.
• Voltnuts
• Open source book
• Tiny Tapeout
• Tantalum Caps from AliExpress
• What’s next for ASML
• Ben Krasnow printing PCB traces again

The post #674 – Turtles as a Service first appeared on The Amp Hour Electronics Podcast.

Welcome, Matthias Balwierz / Bitluni / Luni!

• Midi pedals
• Old projects
• LED walls
• Dunning kruger
• Sonar scanner 
• Aliens
• Romulus
• Lifelong learning
• Beamforming
• Previously had worked on something similar in the medical field but didn’t realize it was the same tech
• ESP32
• Gowin FPGA
• Video generation / crt control
• R2R 
• cnlohr videos for making PCBs
• ESP32 VGA
• PCB mill 
• Failing
• Tiny Tapeout bringing down costs like PCBs
• Jeri doing “home etching” (making silicon at home)
• Building the meme project  on TT02
• GIF construction set
• Almost like a ROM on board, on each clock it exposes the next byte on paralell output
• Luni hasn’t submitted to each tiny tapeout but is building a new project
• Browser assembler that runs in the handheld gaming: “Luni-Asm”
• cpu + gpu to get vector output
• Bitluni live youtube / Bitluni – twitch happens Weds at 8 pm CEST
• Community helps
• Writing memory controllers
• Bus master because internal SRAM is so expensive
• Expense of flash/ram is in IP
• People running test structures the tiles
• FPGAs, Gowin – 9K standard up to 25k
• Gabriel / Lushay Labs – Tutorials for FPGAs
• HDMI connector
• Some IP blocks from Gowin
• Yosys support
• VS code tools and simulation
• Gowin FPGA designer
• Learning clock domains
• Moving back to art
• Demoscene came from the cracker scene
• Different categories / limits
• 4K category only allows 4K of memory for images and sound (generated)
• White demo competitions
• Contact
  • bitluni
  • github
  • twitch

The post #673 – Lifelong Learning with Bitluni first appeared on The Amp Hour Electronics Podcast.

Welcome back, Matt Venn of the Zero to Asic Course and Tiny Tapeout!

(Due to illness and some life stuff happening, my recording setup was crap. Apologies. I also leaned heavily on Matt’s notes, so some of the following links will be out of order. Think of it like an ad hoc scavenger hunt…fun!)

• Matt was last on the show on episode 616, about 18 months ago
• Tiny Tapeout has continued, now working on it’s 8th run. the 5th run is shipping soon.
• Uri Shaked made Wokwi compatible with making chip designs and then compiling them to verilog for later processing by open source tools
• 12 bit SAR ADC on TT07
• linux capable riscv
• Analog ASIC design with digital standard cells!
• We had previously posted Matt’s review of 2023 and aims for 2024 
• Siliwiz
• ASIC inside synchrotron 
• Touring IHP (Germany) facilities
• Interview with Nordic Semi designer
• People are building analog structures on Tiny Tapeout
• There’s a new course on Zero to Asic that will be about Analog (sign up for the waitlist)
• There are some new tools being developed
  • surfer  – browser based waveform
  • moosic – logic locking plugin for yosys
  • eqy – formal equivalence checking
• Matt will be doing a TT workshop at supercon 2024
• TT08 will have a demoscene competition – VGA and sound output – what’s the coolest thing you can fit in 1 tile? You have until Sept 6th 2024 to submit!
• Not discussed, but on the list and interesting!
  • Silicon Supply Chains with Ed Conway
  • An early analog design (temp sensor) on TT03
  • Get TT quality stickers

The post #672 – Silicon Revolution with Matt Venn first appeared on The Amp Hour Electronics Podcast.

• Sideshow Bob (simpsons)
• HERIC Inverter Review
• 
• Fraunhofer
• HERIC inverter
• Dave’s video about the CH32V003
• Charles episode
• Altium is increasing the price of their product (by 2x??)
• HITECH compiler from Microchip
• Newfound Warp13
• Webrings, Blog roll, StumbleUpon
• Dontronics amazing site

The post #671 – NDA Sideshow first appeared on The Amp Hour Electronics Podcast.

Check out the Circuit Break Podcast for show notes

• Parker Dillman
• Stephen Kraig
• James Lewis

The post #670 – Engineering Careers with Circuit Break & James Lewis first appeared on The Amp Hour Electronics Podcast.

Welcome Petr Dvorak of Beny Devices

• A to Z book about KiCad
• fancygit
• lazygit
• gitlol
• Customer types
• Brno – 30% of electron microscopes
• What is changing in electron microscopes? Higher voltage, no noise
• Electrostatic steering
• Transitioning to freelancing
• Regulations for freelancer vs employer
• Petr is a prolific poster of electronics content on his LinkedIn
• Show your work – Austin Kleon
• 3 years to get first client
• 1 month buffer of posts on LinkedIn
• Building repetitions
• Outliers / 10000 hours
• Lists of projects
• Constraints helping new engineers trying to learn electronics
• 8×32 pixel displays
• Petr in Shenzhen
• Gallup – top strength is learning
• Personality types
• Contact
  • Get a free eBook about KiCad on beny-devices.eu
  • Follow Petr on LinkedIn

The post #669 – Freelance PCB Design with Petr Dvorak first appeared on The Amp Hour Electronics Podcast.

The post #668 – 50.0000 Ohms first appeared on The Amp Hour Electronics Podcast.

Welcome back, CNLohr!

• CNLohr was on the last episode talking about the CH32V003 part and the CH32V003fun library
• Charlieplexed errings
• Fast iteration
• Lohr-a…LoRa…get it?
• LoRa

• Started in January 2024 with discussions with mustardtiger / Frank
• Charles had done Wifi long range before
• Also FM from ATTINY85
• Ethernet + AM
• Radio signals without radios
• USB
• Harmonics
• LolRa
• Upchirps / downchirps
• 903.825 – 903.975 mhz
• Michael Ossmann talk
• LoRa doesn’t do code matching
• JP Norair talking about LoRaWAN / DASH7
• Tool / emulator for the airwaves
• 3 lines of the repo
• Tool to create tables
• There are two 2 lookup tables (up and downchirps)
• Table is different for differnet spreading factors and base frequencies
• Andreas Spiess LoRa/LoRaWAN distance attempts
• Spreading Factor — can’t past SF10 on this setup for unknown reason
• AirSpy
• Matt Knight
• LoRaWAN — protocol vs network
• The Things Network / Helium
• Activation by personalization
• Nesting dolls of encryption
• New parts CH32V002 (also, -005, -006. -007)
• Charles is excited about the op amp on the CH32V006 that has 64 MHz GBW
• CH32V203 – 144 MHz – $0.24, has usb xcvr
• CH32X035 is self clocking – best low cost option for USB
• All are supported in library now
• Community – CNLohr discord
• Porting examples for the parts using the technical reference manual
• MNIST database – handwriting recognition system
• Announcement post on CNX about the new parts
• It’s possible to hook up parts directly through the 1 pin SWIO, so you can hot-load firmware
• Writing code onto a “scratch pad”
• Want to see more CNLohr experiements online?
  • Youtube.com/cnlohr
  • discord: cnlohr reach out for invite
  • Github

The post #667 – Long Distance with CNLohr-a first appeared on The Amp Hour Electronics Podcast.

• Sickness
• Starliner scrub
• Boeing and the Dark Age of American Manufacturing
• Toolkit for flying
• Search industry
• A380
• EUV in semiconductors
• EV vs PHEV vs ICE
• Tesla sending emails to suppliers after laying off the Supercharger team
• powerledger / POWR
• Virtual power plant
• DEYE inverter
• Buying repacked batteries
• AC Battery vs DC battery
• Hybrid inverter
• Colin Furze
• TSMC running into problems with work culter after moving to US (Arizona)
• Marketplace piece about jobs at semi plans in AZ
• 996
• Photos of the new Samsung Fab going up on Google Maps
• Chris asked on Mastodon about the best time to charge an EV
• Duck Curve, which Chris first learned about on episode for 630
• The costs of different aspects of a chip fab

The post #666 – Good Energy Citizen first appeared on The Amp Hour Electronics Podcast.

• Analog Cochlear Detectors
• Voyager I is back online 
• Sustaining engineering
• Bobiverse books
• Chandra telescope
• Embedded World
• Embedded World US in October
• Trade shows in US
• Travel budgets
• Z80 obsolete notice
• Rabbit instruction set
• Dave trying out the Jumperless breadboard (lights up)
• Uri
• Robert Nelson
• Bluetooth
• Sigrok
• Zephyr LLEXT
• ZMK

The post #665 – Really long needle nose pliers first appeared on The Amp Hour Electronics Podcast.

• Chris will be at Embedded World 24 next week
• Bluetooth standard messages like HT, HR
• Early bluetooth devices (were terrible)
• WiBree (?)
• Sequans deal with Renesas fell apart
• There was a Sequans modem on the PyCom FiPy
• The low power ISM network Chris couldn’t remember was SigFox
• Synopsis acquired Ansys (back in January)
• Here comes the flood of Plugin Hybrids
• Dave’s sick car – 2010 Nissan dualis – Second channel
• New Espressif ESP32-P4 is getting ready to release
• Bitluni makes custom silicon (spoilers!)
• Past guest Pete Bevelaqua has a new Kickstarter where he’s passing power through a window (up to 30 mm thick)
• Top 10 Hobby Components (PartsBox) – submitted by former guest Jan Rychter
• Top 5 transistor video
• New BealgleBoard.org board isn’t in the BeagleBone form factor

The post #664 – Simulating doors falling off first appeared on The Amp Hour Electronics Podcast.

Welcome Carl Bugeja!

• Carl lives and works in Malta
• He got started with robotics at his university
• Carl recently announced he would be launching a new company
• The company is called Microbots and they will sell components and kits for building similar projects to what Carl shows on his channel
• BigHero6 reference
• https://microbots.io/products/flatflap
• Max PCB temp is 130C
• Driven by series resistance of coil
• Tg value of PCBs
• A circuit that can solder itself
• How hot can a Flex PCB get?
• Batch vs raster
• Do you math?
• Tryng to get the perfect temperatures and dealing with flex materials
• Dealing with manufacturing differnces
• Scanning PCB Coils with X-Rays
• Sending PCB specs
• Incoming inspection and testing
• Testing boards with resistance
• Time flap produce
• User testing
• Drive circuits – How do you evaluate?
• Don’t build your own H Bridge
• Optimizing for size
• Is Carl looking for other features?
• Building libraries for driver
• Foldable 4 wheeled robot , an all one PCB
• ESP32-C3, connected to playstation remote
• Boston Dynamics uncanny valley
• Gathering on social
• Top down vs bottom up (start at the top)
• Prior to YouTube, Carl worked at a startup
  • Drones – 2 prop
  • Bluetooth tags
• Later he moved to the automotive industry
  • Concept vehicles
  • Software
• What’s in Malta?
• Building a remote electronics business
• Remote actuators on a PCB
• Microbots Flexar Driver
• Driving down the price per cell
• Similar to how they drove down the cost of LCD displays
• Pixel, voxel, moxel, maxel?
• Flipdots
• PCB Actuation
• Find Carl on YouTube and Instagram, and check out his work on the new Microbots site!

The post #663 – Motors on PCBs with Carl Bugeja first appeared on The Amp Hour Electronics Podcast.

• Chris got a Chevy Bolt (2023 1LT) The model has since been discontinued
• 11 kW charging using a level 2 charger
• Flappy paddle to recapture battery (instead of the brake)
• Ioniq 5/6
• Aptera
• Marques Brownlee reviews the Prius
• V2G is avaialble as a software upgrade to the Nissan Leaf
• 2nd channel abs bypass
• Microbit v2
• Robot video with Huxley
• Software updates on a door handle
• Chris is playing around with 20V DeWalt batteries
• Battery fast charger schematic
• Bosch adapter
• Vmount batteries, as explained by Caleb of DSLR Video Shooter
• Sony batteries
• Dave’s tutorial on charging
• Chris might try out OnShape
• If you’re interested in helping model some battery stuff (or know someone who can), please email chrisgammell@golioth.io
• Sony battery lab hack

The post #662 – The non-Stinky Car first appeared on The Amp Hour Electronics Podcast.

The post #661 – Blogging Electronics with Pallav Aggarwal first appeared on The Amp Hour Electronics Podcast.

The post #660 – My Toothbrush Is Broadcasting first appeared on The Amp Hour Electronics Podcast.

• Renesas buying Altium
• Altium bought Octopart in 2017
• Tasking debugger
• Cloud focus after reorg
• History of Protel / Altium – started in 1985 by Nick Martin
• Turbo Pascal
• CAD tool for windows in 90s
• protel99
• Altium Buys Morfik in 2010
• Nick booted out 
• After the reorg, the stock steadily grew
• You can watch the Renesas/Altium announcement on Zoom 
• There is also a slide deck available
• Dave linked an article from the financial press in Austrailia
• Zuken
• Altera is apparently spinning back out
• Steve Liebsen on The Amp Hour
• Intel is getting a $10B chunk of the CHIPS act money
• Steve Sanghi (Microchip) discussed the act when he was on the show
• Synergy flavored milk
• Other properties we forgot were part of Altium:
  • Circuit Studio
  • Upverter (formerly on the show!)
  • Gumstix
• Autotrax – Taylor’s version (DEX PCB just…took the name?)

The post #659 – Altium…Acquired! first appeared on The Amp Hour Electronics Podcast.

• AI tools for recording
• 32 bit recording
• Pool robot
• Home assistant
• Power points in the ceiling in Dave’s office park
• CH32V003 board
• CNLohr episode
• rv003usb library
• Mike Harrison doing a video about a CH32V003 standalone programmer
• nRF24
• Low cost modules Chris bought on Amazon
• Samy Kamkar on the show
• Samy talk about balloons
• Drone shows
• Time difference of distances
• Dave’s video about HP atomic clocks
• XKCD Radiation Dose Chart
• DTCXO
• In the Bond movies they’re not nerds
• LCD and fonts
• AI pin
• Vision Pro
• iFixit teardown
• Chris will be at Embedded World again this year, come say hi!

The post #658 – Uncle Al’s Eating Garbage Again first appeared on The Amp Hour Electronics Podcast.