220V LED Flasher circuit diagram

Posted on Feb 5, 2014

This is a 220V LED flasher circuit which is intended as a reliable replacement to thermally-activated switches used for Christmas tree lamp-flashing. This a cheap circuit and easy to build. R1_ 100K R2, R5_ 1K R3, R6_ 470R R4_ 12K C1_ 1000 F 25V D1-D4_ 1N4007 D5_ SCR P0102D Q1_ BC327 Q2_ BC337 SK1_ Female Mains socket The device formed by Q1, Q2 an

220V LED Flasher circuit diagram
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d related resistors triggers the SCR. The flashing frequency is provided by R1, R2 and C1. To change flashing frequency value, just set C1 value from 100 to 2200 F, don`t modify R1 and R2. Best performances are obtained with C1=470 or 1000 F and R4=12K or 10K. Due to low consumption of normal 10 or 20 lamp series-loops, very small and cheap SCR devices can be used, e. g. C106D1 or TICP106D.

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