My Kraftwerk tie

I whipped this up in a couple hours for my Kraftwerk Halloween costume. No microcontroller! Just a 7555 timer and a 4017 decade counter running off two AAA batteries.

If you don't get it, see: http://www.youtube.com/watch?v=VXa9tXcMhXQ

The connections on the underside of the tie were wire-wrapped, and the AAA battery pack goes inside my shirt. I was thinking of using a 3V coin cell, but it would've probably lasted only a few minutes.

If I had thought of this earlier, I would've used a surface-mount ATtiny2313 with multiple patterns built in. Next time!

Видео My Kraftwerk tie канала Matt Sarnoff