Hacky Random Number Generator / Cat Toy

For my entry to the Dangerous Prototypes 7400 Contest, I decided to make a true random number generator. In particular, I wanted a latching RNG — not merely a continuous stream of numbers, but a continuous stream which I could sample at intervals. The circuit would be made up of a minimal number of digital logic parts. And deliberately inducing noise into the digital circuit would involve breaking all the usual design rules, which is fun.

Twirly Webcam

Reaching forward to adjust the webcam got old. Technology came to the rescue in the form of a webcam that pans around the room under the control of a paddle or foot pedal.