Quantity   Component name
1 × Uinpolar-Feather PC board
1 × MCP23008-E/SO‎ 8 Bit i2c port expander
1 × ULN2803ADWRG4 Darlington Transistor Array
2 × 4.7K Resistors
1 × 470uf Capacitor
2 × XH JST 2.5 5 Pin male headers
1 × SPDT Switch
1 × 3 pin male header
1 × 2 Pin Terminal Block