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3W LEDs, from Micro-controller, via MOSFETs
2020-Sep-06, Sunday 02:32 pmTime to play with some super bright LEDs! (Just remember; do not look directly at them while powered.)
Kitronik have some lovely 3W LEDs (with unfortunate name) in a star shape for heat dissipation. They provide a datasheet with example circuit for 5V power source. It requires 2.2 ohm power resistors, which are new to me. But when I tried regular resistors there was a lot of smoke, so they are definitely required.
I want to control the lights from a lower voltage micro-controller, so I'm going to need some N-channel MOSFETs. This is my first time using these. The Data pin (from the Arduino) acts a switch to complete the higher power circuit that lights up the LED.
All together the circuit looks a bit like this.
( Images )
Kitronik have some lovely 3W LEDs (with unfortunate name) in a star shape for heat dissipation. They provide a datasheet with example circuit for 5V power source. It requires 2.2 ohm power resistors, which are new to me. But when I tried regular resistors there was a lot of smoke, so they are definitely required.
I want to control the lights from a lower voltage micro-controller, so I'm going to need some N-channel MOSFETs. This is my first time using these. The Data pin (from the Arduino) acts a switch to complete the higher power circuit that lights up the LED.
All together the circuit looks a bit like this.
( Images )
