Power on hands

A project log for Broke Hackers' Model Railway

Cheap, fully automated model train system with 99.9999% 3D printed parts.

Szabolcs LőrinczSzabolcs Lőrincz 08/20/2014 at 19:380 Comments

Finally managed to power the AVRs through the TWPC bus. It won't drive a motor yet, but it's enough for the MCU and some LEDs.

I added a 47uF capacitor to the AVR's Vcc and GND legs. The energy comes from the data pin through an internal diode and stores in the cap for stable and continous power.