In the winter of 2016, someone gave me a controller board for a heater. The
heater is pretty scary, it burns fuel and blows exhaust and hot air out of
what looks like a canon. It has some interesting mechatronics; a fuel valve,
an ignition coil, and a fan. It has a flame detection sensor input as well, as a
safety feature. I succeeded at repairing the board, but had to write the
controller software from scratch.
