| 번호 | 부품 | Arduino |
| 1 | button #1/#2/#3/#4/#5 LED + | 7, 8, 9, 10, 11 |
| 2 | button #1/#2/#3/#4/#5 LED – | GND |
| 3 | button #1/#2/#3/#4/#5 switch VCC | 2, 3, 4, 5, 6 |
| 4 | button #1/#2/#3/#4/#5 switch GND | GND |
| 5 | buzzer VCC/GND | 12/GND |
| 7 | start button VCC/GND | 13/GND |
| 8 | LCD (16×2) GND/VCC/SDA/SCL | GND/5V/A4/A5 |
