CC High Power 10W plus LED Driver

417

07:55:06

I have not breadboarded this yet due to lack of large LEDs, but it looks quite simple. 

N Channel MOSFET 
2N3904
0.75 = 1W (for 10W LED)
100K & 3.3k resistors = 1/4W

TTL level PWM signal to drive ckt.

Necessary to play with input voltage depending on LED requirements. Adjust 0.75 W value accordingly.

Shamelessly stolen ideas (with only slight modification) from instructables dot com

published 10 years ago

saket

10 years ago

What if the input available is just 14 v with 10w led driven at 12v 700mA? Also can you put the instructables link in desciption

gijimodo

10 years ago

I think 14v would be about right for a 10W LED IMHO. http://www.instructables.com/id/Build-the-Ultimate-Larson-Scanner/

gijimodo

10 years ago

Check this link too: http://www.instructables.com/id/Circuits-for-using-High-Power-LED-s/

Sine_eyed

10 years ago

In relation to input voltage & LED requirements: wouldn't it be a better idea to set input V to match whatever power supply was to be used, and also adjust LED values to match their real-life counterparts? Here's an FYI to any and all: ec's editor will change more than just the color of a LED, forward voltage drop and current parameters are just a couple of settings that allow adjustment. In fact many (but not all) components here have many setting adjustments that can be made. A component allowing multiple adjustments is denoted by a yellow highlight bar just above the value that is to be edited. Just click on that bar and a menu of the available values that can be changed will pop up.. :^)

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