| Quantity | Component name | |
| 1 | × | LM358 Amplifier and Linear ICs / Operational Amplifiers |
| 1 | × | Socket for Amplifier |
| 1 | × | Arduino Nano |
| 1 | × | Bluetooth module |
| 2 | × | 1n4148 Discrete Semiconductors / Diodes and Rectifiers |
| 2 | × | Electrolytic Capacitor 2.2 uF @63 volts |
| 2 | × | Polyester Capacitor 68 nF @250 volts |
| 1 | × | Photo transistor |
| 1 | × | Infrared led 5mm |
| 9 | × | Resistor Various Values 1/4 W |
| 1 | × | Potentiometer TRIMPOT |
| 1 | × | Socket for Arduino |
Lilia Lobato