i2c Tag

2 Articles



Canary v1

22 Jun 2022

projects: home-automation
builds: canary
tags: 3dp circuit-python i2c rp2040 stemma

Recently my partner bought an LCD resin 3D printer. That was kind of the last straw for a risk that has been growing in the last few months. I already had a filament 3D printer (so far just for PLA, but who knows!), and several weeks ago I hooked up a kegerator with a carbonation system. Oh, and all of these share the same airspace as my office. The risk we’re concerned about is a buildup of VOCs, carbon dioxide and carbon monoxide.Read More...


LED driving, I2C chains, pull-up and -down resistors

27 Jun 2021

builds: Lander Module
tags: gpio i2c

I’ve been getting up to speed on LED driving and button/switch driving, so that I can prototype a Raspberry Pi with code that reads a switch, and turns on and off an LED. A couple of thoughts here: The RPi 0W has 26 available GPIO pins. This feels like a lot, but if I pair one or two LEDs with each toggle switch, I’ll run out quickly. Next I found this AW9523 breakout, which controls 16 I/O over I2C.Read More...