LED Flashlight with 1w Constant Current Drive

A constant current LED driver was implemented to power a 1 Watt Cree P4 XR-E providing roughly 85 Lumens @ 350 mA. The constant current SMPS was based on the LTC3490 allowing operation from an input as low as 1 Volt. The entire assembly was retro-fitted into a late 1950’s Eveready flashlight housing.

1) Schematic  2) Board  3) Assembly  4) Light Saber

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