| Quantity | Component name | |
| 1 | × | Arduino Board I used an Arduino UNO, but every Arduino should do fine. |
| 1 | × | Breadboard |
| 2 | × | Push button |
| 2 | × | LED Preferably in different colors. |
| 4 | × | Resistance - 2 of 220 ohms (for LEDs) - 2 of 10k ohms (for buttons) |
| 1 | × | Jumper or solid wires |
Luis A. Tórtola