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LED flashlight circuit

2017-02-05 22:02  
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LED flashlight circuit
7555 time-based IC(can not use normal 555) is the core of a LED flashlight.A white light-emitting diode (if you can not find one, just take other colors) is issued about 400mcd brightness when it works, so that when it focuses, it can illuminate objects in 30 meters. The approach to focus is to install a short focal length focusing lens in front of LED .   If you want to use other voltage values, the value of resistor R3 must be modified: 9V - 470 Ω 12V - 560 Ω