![]() White LED Forward Drop VoltageĪs we all know, a white LED typically needs a 3.5 volt supply for illuminating directly, without the need of any current limiting resistors. The proposed circuit utilizes just a single high bright white LED, three 1.5 volt button cells and a switch. The LED flashlight circuit explained here is very simple, and it simply requires to follow the instructions as given for making it successfully. No surprise why white LEDs are being considered as the future option for all lighting applications. White LEDs are so efficient that they produce 4 times more light than a conventional incandescent type flashlight yet consume 60% less power. Though not as bright as a white LEDs, filament bulb type flashlights served the purpose quite well, until LEDs were invented, which completely transformed the scenario. ![]()
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