- 3 FSR's, for example these: http://www.ultibots.com/fsr-force-sensitive-resitor/
You can also get these same FSR's from Adafruit or TriDPrinting.
- 9 M3 nuts.
- 9 M3x10 socket head cap screws.
- An Adafruit Trinket board or JohnSL's board, for example in this kit: http://www.ultibots.com/fsr-kit/