rroll is an open source (GNU GPL v3) Arduino project that uses an ultrasonic sensor to unleash cheesy music on unsuspecting passersby. Whenever someone enters within 6 feet of the sensor, the device is activated and starts playing Rick Astley’s “Never Gonna Give You Up”. When the person leaves the area, the music pauses, only to resume where it left off when the person re-enters the area.
The device is powered entirely off of batteries so it can be hidden in the most obscure of places. I hot glued the components into place inside the casing to make a semi-permanent device. This will allow it to be jostled around without falling apart.
Code/parts list available at http://zachrattner.com/rroll
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