Relay Computer

My journey in constructing an 8 bit relay computer from scratch ... made from of a ton of solder, wires, lights, relays, sweat, tears, swearing and money.

ALU Construction: LED Tests

06 Dec 2013     construction , video , ALU

Following on from my last post I can now test the LEDs that have been soldered and hooked up to the header pins on each of the three ALU cards (Logic, Arithmetic and Control). As promised, here are the videos of said testing:

You might notice I’m prodding around slightly more carefully on the arithmetic and control cards … due to a lack of foresight I’ve ended up with every second header pin being a direct line to 0v … which is not great when the thing I’m holding has 12v at the tip. Luckily my power supply handles short circuits well but even the briefest of sparks can be a tad embarrassing. At some point I’ll chop off the extraneous header pins (as they’re not needed) to ensure I don’t accidentally wire-wrap to one of them later on.