This project is run by an Arduino connected to a CRT TV. The potentiometers on the neck control the notes played which are displayed on the TV and picked up by a coil pick.
Components
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Arduino UNO or MEGA
I used an Arduino UNO but a MEGA would be even better
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CRT Television
Preferably one that is small, Mine was 5 inches and I got it off etsy. Ebay is also a great place to look
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SoftPot Membrane Potentiometers
I got the 200mm from sparkfun.com. These will be the strings
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Video RCA Cord or Adapter
You can cut one up and solder it or get an adapter that connects to jumper wires
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Ukulele Neck
You can also use guitar neck or just 3d print one