The Hackery gave us a box of about 100 microcontroller boards from some kind of commercial product. These are in a box under the electronics benches and are up for grabs for any project. I don’t have a schematic, but it’s a 2-layer board so it’s probably pretty easy to trace.
Here are some of the features:
-ATMEGA16-16AC with an 8.000MHz crystal
-12VDC 2.1x5.5mm barrel jack power input
-2 Relays: 3A 125VAC/39VDC
-footprints for RS232 (max232?) transceiver IC and DB9 connector
-2 bicolour LEDs