Simple light-operated street lamp circuit diagram(3)


Posted on Feb 5, 2014

VDP is the photodiode and it has low resistance in the day, and resistance ? 1k?, then transistor VT2 is turned off, then thyristor VT1 is in the off-state as the gate has no trigger current, and E can not be lit. In the night, VL shows a high resistance as no light exposure, and the resistance ? 100k?, then VT2 is turned on, and the emitter can output pos..


Simple light-operated street lamp circuit diagram(3)
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