led - How to design a boost converter? (1.5V to 4V) - Electrical Engineering Stack Exchange
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Very Long Time Flashing LED By A Single 1.5V Battery..Simple LED Flasher Circuit..[Hindi] - YouTube
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Run LED Super Brightly By A Single 1.5V Battery..1.5V LED Circuit..Joule Thief Circuit..[Hindi] - YouTube
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Long Time LED Flasher By A 1.5V Battery..How To Make Transistor LED Flasher Circuit..[Bengali] - YouTube
