Im not really understand on reset button. Can someone explain to me? Let said i using sensor and relay and also buzzer. The sensor on the buzzer not working but if the buzzer of then the buzzer working. Now i wanna stop the buzzer sound. How do do? Im using 12-24dc volt sensor, 12dc relay and also 12dc buzzer. Im not clear on this matter. Any idea on this matter or i need to use IC for this circuit.