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I need help hacking a solar light to use as light switch. Answered

I recently bought some hanging multicolored led lights (they look like UFOs). They use 3 "C" style batteries as their power source. What I would like to do is make them light sensitive. Basically letting them turn themselves on when it gets dark. If anyone has any ideas on how to do this, your help would be greatly appreciated. I'll try and post some pics of them later today.

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Rob311
Rob311

9 years ago

Use a comparator to compare the resistance of a photo resistor to the resistance of a potentiometer and trigger a transistor at that point. Its kinda like legos.

http://www.reuk.co.uk/LM741-Light-Dark-Sensor-Circuit.htm