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Monday, September 14, 2009

Lamp flasher circuit


This simple circuit that can be used to flash incandescent lamps up to 10W power rating.The circuit is ideal for making flashing beacons on automobiles and other applications like that.The circuit is nothing but an astable multi vibrator based on Q1&Q2 ( BC557&BD139).The capacitor C1 is the main timing element which determines the flashing rate of the circuit.The switch S1 can be used as an ON/OFF switch.





Notes.

* Power the circuit from a 12 V battery or 12V DC power supply.
* Assemble the circuit on a goood quality PCB or common board.
* A 12 v , 10W incandescent lamp can be used as the load.
* All capacitors must be rated 15V.

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