modified 11 years ago

Flashing 2 1Watt LEDS using 1.5 Volt Supply

04:57:26

Concept flashing 2 1watt white LEDs using a 1.5 volt supply not tested this is just concept experimenters circuit so many variables effect it function L rb  tffon/tOff Vcc  can be expanded for more LEDs

Each LED is 3.2 volt 280mA

Don't have to be 1 watt leds you could drive  a string off 20mA LEDs using low voltage supply 

Current builds up in the inductor during tOn at tOff the transistors turns off the inductor flysback and generates a rising high voltage at the collector this is clamped by leds to about 8 volts discharging the inductor through the LEDs

published 11 years ago

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