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A laser cut touch MIDI keyboard project
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A laser cut touch MIDI keyboard project.

This project is available as kits at:

It uses:

  • 1x Arduino Pro Micro
  • 1x MPR-121 Touch Sensor (3.3v logic ONLY)
  • 1x Bi-directional logic level converter (This LLC only needs 5V supply and it regulates down to the 3.3V needed for MPR-121) I used this one:
  • 1x 3.5mm stereo female jack (has 3 leads used for TX, RX & GND using serial communication)
  • 22 AWG hookup wire
  • 1/2" copper tape
  • 1/8" birch plywood
  • 10mm M3 hex flathead bolts & M3 nuts


  • Soldering iron
  • Solder
  • Wire strippers
  • helping hands
  • 2mm hex wrench/driver
  • 3D printer
  • Laser cutter

If you don't have access to a laser cutter or 3D printer kits are available at:

This project is designed to interact with another project, Mr. Roboto found here:

  • In mode 3 on Mr. Roboto as the robot moves it sends random MIDI notes to the keyboard to be played.
  • In mode 4 on Mr. Roboto as the keyboard is played different parts of the robot will move.

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