bneedhamia

I *loved* our high-school's Minivac; my two favorite creations were a combination lock and creating music on the buzzing relays. Tip: make far more patch cables than you think you'll need.Thank you for this marvelous recreation!

I recall I made the relay buzz through a feedback loop: when the relay closed, the power to the relay cut; when it opened, the power was restored, making it buzz. It might have been hard on the relays; I remember the smell of the sparking relays. I also remember that I was able to make the buzz fade out, but I've forgotten how... I might have used the dial's motor as a sort of clock.

Brilliant idea! Add a microphone to the Arduino and you're on your way. Thanks!