random noise maker

Sparkfun's MP3 trigger in case on the actuator mechanism for the random noise maker.
Sparkfun’s MP3 trigger in case on the actuator mechanism for the random noise maker

Someone asked me to build a gadget that will randomly play one of 4 sounds when a cord is pulled.
I decided to build it using Sparkfun’s MP3 trigger. I designed and laser cut a case for the circuit board and plasma cut an adjustable hinge mechanism to mount it in. (download .pdf).

I am really please with the MP3 trigger, setup was a piece of cake: put mp3s onto a microSD card, add config file to set a trigger to random, solder on a switch, done. Designing the case and mechanism and setting it all up took a bit longer, but a satisfying project over all.

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