Hi all
I am trying to design a pwm controller to run some RGB leds for a project I've been working on. Unfortunately, as they are super-bright, I can't seem to find a solution that can give me the kind of voltage and current output that I need. My LEDs have a Vf of 2.5 (Red) and 3.4 (Green and Blue) volts respectively and a forward current of 400 (Red) and 350 (Green and Blue) mA respectively. I am trying to run four of these leds (either in series or parallel, it doesn't really matter to me) and control them with three potentiometers (1 for each channel: R, G, B). I have read over Bill Marsden's guide to LEDs and I think I have an idea of what I need to do but I'm having trouble working out a solution that can handle both the voltage and current that I need. Any advice would be much appreciated.
I am trying to design a pwm controller to run some RGB leds for a project I've been working on. Unfortunately, as they are super-bright, I can't seem to find a solution that can give me the kind of voltage and current output that I need. My LEDs have a Vf of 2.5 (Red) and 3.4 (Green and Blue) volts respectively and a forward current of 400 (Red) and 350 (Green and Blue) mA respectively. I am trying to run four of these leds (either in series or parallel, it doesn't really matter to me) and control them with three potentiometers (1 for each channel: R, G, B). I have read over Bill Marsden's guide to LEDs and I think I have an idea of what I need to do but I'm having trouble working out a solution that can handle both the voltage and current that I need. Any advice would be much appreciated.