Quantity   Component name
4 × 10K ohm 1/8-1/4 watt resistor
1 × 220 ohm 1/8-1/4 watt resistor
1 × 1k ohm 1/8-1/4 watt resistor
4 × BS170 N-channel MOSFET
1 × Teensy3.1 board
1 × 2x20 0.1" female header
2 × 10uf tantalum capacitors
1 × LM-1117-3v3 TO-220 Voltage regulator
3 × 3.5mm 2-position Terminal Blocks
4 × (Optional) 1x14 0.1" female header strips, with pins removed to comply with Teensy3.1