Lamp flasher II


Posted on Jun 15, 2012

Brief full-power flashes are obtained when the SCR conducts during positive half cycles of the line voltage. The SCR fires when the voltage at the divider, R3 and R4, reaches the gate-firing level.


Lamp flasher II
Click here to download the full size of the above Circuit.

DiodeD1 conducts during the reverse cycle of the SCR and provides preheating current to the lamp filaments.




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