Hello, I'm trying to do a project where I use a switch to turn on an LED (no microcontroller at all :slight_smile: I want to use this "3W" LED: Forward Voltage: 2.0-2.4V Forward Current: 400-500mA I know a lot of these high power LEDs use a constant current source to provide the 400mA. But if I…

high power LED, forward voltage, current - advice

ted April 17, 2018, 3:36am 4

I am using resistor is working OK for years, but at 80% of the brightness.

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