Ghetto Cooling

Here is a ghetto rigged air cooling system for my circuit. It’s a rackmount fan propped up with two dental picks on top of a cardboard box. This is next to a $0.25 million test system.

I’m doing some manufacturer comparison relay lifecycle tests. The current through the relays causes them to heat up a bit, hence the cooling. Hopefully the relays cycle at least 1 million times a day. That’s between 11 and 12 Hz.