Sunday, September 7, 2014
Lamp flasher circuit
This simple schema that can be used to flash incandescent lamps up to 10W power rating.The schema is ideal for making flashing beacons on automobiles and other applications like that.The schema 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 schema.The switch S1 can be used as an ON/OFF switch.
Notes.
* Power the schema from a 12 V battery or 12V DC power supply.
* Assemble the schema 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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