Wednesday, February 24, 2016

220V lamp flasher with IC 555

This is 220V 800W lamp flasher circuit directly connected to 220V mains. One or more lamp which has high consumption / power can be used. It is ideal for signage warning or danger, this circuit flickers the lamps.
220V lamp flasher with IC 555 circuit

The work of this circuit is simple. The 400V capacitor, the bridge rectifier, the zener diode and the capacitor 100?F will form the power supply voltage which obtained approx. 9VDC from transformerless power supply design. 

IC 555

The integrated 555 and its annexes components generate a train of pulses applied on the triac optocoupler MOC3021 driven intermittently causing the lamp on and off continuously. The triac may be a 2N6073A or TIC226D. By changing the 100K resistor or 1?F capacitor, then the flashing time will changed too. The rectifier bridge may be four 1N4007 diodes or 400v bridge diode with 1A current. The triac should be mounted on a heat sink to prevent over heating.

Warning!!! The entire circuit operates from 220v mains without insulation so the appropriate safety precautions should be taken to minimize the risk. Build this 220V 800W lamp flasher circuit with your own risk.

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Electronic Circuit is a good site for hobbyist also who would like to try DIY because it shared good circuits.