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Transistors may sometimes work nice as firecrackers.

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  • Mahitchima commented on Mahitchima's instructable light sensor9 months ago
    light sensor

    if the LED you are using can handle 5V, it would be okay but if not you could also make a voltage divider for the LED so it only gets 3V input.you might need to change R1 to a higher value one.look up on kirchoffs & Ohms laws.The math and how it works is explained over.

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