This was a one-hour-long project where I mounted an Arduino and a servo to turn sheet music for me. My roommate and I were playing a guitar duet, but there was no good pause to flip the page, so I cooked this up. The servo is activated by a pedal which closes the circuit and gives the servo power. All the Arduino does is provide the PWM signal for the servo.

See it in action in this video (at 27 seconds in)

https://www.youtube.com/watch?v=m6sUBq9lTnA

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