1-Potenciometro 10k
2-Resistor 470r
1-Resistor 10k
1- led ou buzzer
1-Lm 358
1-Fhotodiodo emissor
1-Fhotodiodo reciptor
------ Alimentação 12 Volts ------
------ Arquivo esquema ------------ https://drive.google.com/file/d/1y2MMBhPwQugweALOx0OBncqvpaQnTmlq/view
