High Power LED lights

Discussion in 'The Projects Forum' started by Adriatic, Nov 14, 2010.

  1. Adriatic

    Thread Starter New Member

    Nov 14, 2010

    I have one simple question cause I don't know anything about that:

    Let say I have high power diodes like those two in the picture
    What do I need to do and have if

    a) I want to connect 50 of high power led in series

    b) I want to connect 10 5w and 10 10w leds in series

    Do they have all that is necessary already in them like capacitor and heatsing.

    Thank you very much
  2. beenthere

    Retired Moderator

    Apr 20, 2004
    A. Say the operating voltage is 3 volts per LED. You will need a supply of something over 150 volts, plus a resistor (or PWM) to limit current to the specified level. The resistor will allow only one level of output, while PWM can let you dim the string.

    B. You will have to say more about the LED characteristics. It may be that the only thing you can do is have 20 LEDs in series, but only outputting 5 watts.

    You must read and understand the data sheets for the LEDs to know about heatsink requirements.
  3. iONic

    AAC Fanatic!

    Nov 16, 2007