#maker This is quite an old project which I finished in 2015.
A "complete #Arduino" in an #automotive ('Bosch-style') relay case with a USB connector (for use as kinda "micro-#PLC" in cars).
It is based on #ATMEGA32U4 and is even somewhat modular, you can combine different base-boards (the bottom one) with different MCU-boards (the top one).
The base board is responsible for the physical I/O level and for power supply and protection.
There's even an optional ('headless') #MSD #Bootloader for it.

Hackaday Prize 2022: House Ventilation Reverse-Engineered And Automated

https://hackaday.com/2022/06/01/hackaday-prize-2022-house-ventilation-reverse-engineered-and-automated/

#ReverseEngineering #environmentcontrol #2022HackadayPrize #TheHackadayPrize #atmega32u4 #homehacks #smarthome #CC1101

Wrote a blog post about some of the issues I ran into while working on #Kaleidoscope:

https://asylum.madhouse-project.org/blog/2019/02/03/nop-nop-nop-says-the-clock/

All three cases are connected, all low-level, and not easy to search for symptoms. Hopefully this little post will be useful for the next person trying to figure out some mysterious bugs.

#AVR is an interesting platform to develop for. I should read the #ATMega32u4 data sheet & docs at some point.

If, for some reason, you ever wanted to flash a #Teensy from #JavaScript, now you can: https://github.com/keyboardio/teensy-loader.js

(Only supports the #atmega32u4 for now)