Posted in Arduino Hacks, LED Hacks Tagged atmega328p, infrared, ir blaster, remote control, tv-b-gone, USB to serial Post navigation ← Cerberus 2080 — Three-Headed Retro Computing Project ...

He decided instead to use an Arduino to monitor the 3.3V power rail on the Pi. When the Pi is shut down in software, the Arduino can sense that the Pi isn’t on any more and disconnect the power.