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this is a cheap and easy way to use the usb power for the purpose of getting light. it consists of led, a transistor and some resistors. this can ...
12 x bright white leds 1200 1 x 2N3904 1 x 100 r resistor 1 x 10k resistor 1 x usb cable 1 ...
complete the circuit according to the circuit diagram, connect the led in parallel (you can add more led if you need) also check fr the polarity of the led before placing it ...
hope you like the circuit......
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