Car Lights On Warning Buzzer

With lights on and ignition switch off the piezo buzzer gets power from the lighting circuit and finds ground return through the ignition coil when ignition contact points are closed or through the fuel pump or fuel gauge.

Car lights on warning buzzer.

Then the electric currents come to diode d1 and a resistor r1. If your ignition switch is on the buzzer is silent but when you turn your. First of all we turn on the light switch. With ignition switch on but no lights the piezo buzzer has 12 volts on one side but will not pass current in that direction so also does not sound.

It is the positive voltage power supply of this circuit. Car headlight on buzzer alarm reminder kit universal. When your door is open the door switch makes an earth connection to terminal 3. Lights left on warning buzzer.

The capacitors c1 c2 and resistors r3 r4 are timing section and to set a frequency of output signal. When your lights are on they feed 12v to terminal 2. The red wire connects to the of one car front light black wire is connected to the switch on the door as shown in the diagram. Here s how it works.