Lamp flasher circuit

Posted on Feb 6, 2014

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

Lamp flasher circuit
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the circuit. The switch S1 can be used as an ON/OFF switch. I`m building a model lighthouse with an occulting light (on more than off). To be protypical the light needs to be on for 4 seconds and off for 1 second. I understand I can increase the value of C1, but won`t that increase the off time too

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