SimpleTronic | Ambient Light Powered LED flasher @simpletronic1299 | Uploaded July 2015 | Updated October 2024, 2 hours ago.
This LED flasher circuit harvests the light in your room with a photovoltaic cell and charges a capacitor . This energy is then returned as a led flash. Efficiency of circuit is high with incandescent / halogen lighting ( and obviously daylight ) and low with fluorescent.

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