| Part | Amount | Price per item |
|---|---|---|
| Arduino Pro Micro | x1 | $6.96 |
| CD4051 Multiplexer | x2 | $1.00 |
| 10K Linear Potentiometer | x8 | $0.65 |
| Tactile Button Switch | x14 | $0.07 |
| Custom PCB Board | x1 | $2.99 |
| USB B Female Port | x1 | $1.26 |
| Micro USB Cable | x1 | $3.79 |
| Total | $23.18 |
All prices based on Amazon.com