More Knitted Circuitry
This one uses a programmable ATtiny85 chip. Putting it in a chip socket means I can pop it out any time to reprogram it. I didn't originally intend for it to look so much like a heart-- I was originally going for an argyle pattern. But I discovered that if you have something shaped like a triangle and you put a bunch of red lights on it, you end up with a heart. So... I gave it a heart beat.