We can see when we use torches we can't use it for long time but here I have mention a circuit. it shows the way of using a long life L.E.D torch.It gives 80 times longer service.Than normal Torch.
Note
# If you want to use different voltage you can do these modifications.
# Change R3 values as follows, according to the power.
9V - 470 Ohm
12V - 560 Ohm
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