Quantity   Component name
1 × PJRC Teensy LC
1 × Socket, DIP 28 WIDE Optional but recommended
1 × Experiment board (10x5 cm for 12 col ver, 7x5 for 8 col ver)
36 × Tact switches, 6x6 mm Only 24 needed for 8 col version
1 × Pin header strip, 1x40
1 × Pin header strip, 1x40, 90° angle For touch electrodes... just a suggestion
1 × Alu tape, adhesive For touch electrodes... just a suggestion
1 × Magnet wire or other wire of own choice For connections on the perf board
1 × Something non conductive to cover the back I used adhesive neoprene