This 555 timer Lamp signalization circuit can substitute the signalization relay or other signalization circuits much expensive . The heart of this circuit is a 555 timer circuit that works on a fixed oscillation frequency . This auto lamps signalization electronic circuit can be powered from a 12 volts power supply ( you can use car battery but don’t connect circuit directly to the car battery ) . The circuit also offers visual indication for the driver ( the RED Led and GREEN LED must be mounted to offer a visual indication to driver ) for right side and for the left side .
You can use this signalization circuit even for other auto traction machines . The resistor mounted in the emitter of T1 ( AD149 ) must be 1 watt power resistor .