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 ...
May 22, 2025•1 hr 12 min
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...
May 13, 2025•1 hr 19 min
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 p...
Apr 15, 2025•1 hr 13 min
Welcome back (for a third time!) Michael Gielda of Antmicro Michael and Chris usually see each other around the Zephyr booth at Embedded World , but not this year Antmicro continues to work on Zephyr , which targets hardware using Devicetree Renode Mult-node testing code aethero Data center in space Cosmic shielding corporation Tying the simulation to reality How do you know an actuation has happened RESD – Renode sensor data format Drone data example Finding and testing the variety of use cases...
Mar 24, 2025•1 hr 12 min
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...
Mar 12, 2025•1 hr 2 min
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 P...
Feb 26, 2025•1 hr 14 min
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) Capa...
Feb 12, 2025•1 hr 10 min
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 w...
Jan 28, 2025
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...
Jan 21, 2025
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 c...
Dec 23, 2024
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 Berke...
Dec 10, 2024
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 cellul...
Nov 20, 2024
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 P...
Nov 06, 2024
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 differe...
Oct 31, 2024
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...
Oct 21, 2024
Dan Esparon from Inovor Technologies in South Australia joins Dave to discuss all about the engineering of designing and launching satellites! Dan works for Inovor Technologies , an Australian company that designs and builds satellites entirely in-house! Recently they designed and launched the aussie Kanyini satellite on a SpaceX Falcon 9 rocket https://www.inovor.com.au/missions/ They design and build their own Flight computers, ADCS systems, UHF radios, Battery modules and Solar Arrays in Aust...
Oct 11, 2024
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 ...
Oct 01, 2024
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 v...
Sep 23, 2024
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...
Sep 03, 2024
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 le...
Aug 09, 2024
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 AliEx...
Jul 25, 2024
