Magic Pixies, Bits and Bobs
A grab bag of circuits and control boards, from a WiFi-dumping carputer and a handheld air quality monitor to interconnected fire alarms.
January 31, 2017
One of my first forays into circuits - a carputer! While driving, it collected data from the OBD2 port. As soon as it saw my home WiFi network, it dumped everything into my dashboards. I selected TinyCore Linux, which resides entirely in RAM, to avoid write caching issues after a sudden power loss (turning off the car).
May 18, 2018
The sales guys at an HVAC company wanted a way to upsell air quality treatments, so I built them a handheld air quality monitor. Because why confuse the customer with a PPM readout when you can just flash a red light?
September 05, 2018
JTAG debugging an early version of the industrial control board I designed.
March 05, 2019
The final version of that control board - powered by Texas Instruments.
March 05, 2019
Power supply for the control board; transforming 120-230v AC to 9v DC.
February 28, 2021
Reading outputs from the control board on an oscilliscope while watching the serial logs.
March 23, 2021
Building a new doorbell - this one texts me instead of playing a chime!
December 25, 2024
Running a new branch circuit for hardwired / interconnected fire alarms.