High Power Infrared LED

Discussion in 'The Projects Forum' started by zcsx727, Feb 8, 2012.

  1. zcsx727

    Thread Starter New Member

    Feb 8, 2012
    Greetings all, I need help in determining if I could build a IR LED with the components I purchased.

    I bought a 5W infrared LED that has requires a forward voltage of 1.4V and forward current of 1400ma.
    Link: http://www.ebay.com/itm/1pc-5w-940n...629?pt=LH_DefaultDomain_0&hash=item2ebb4b4fc5

    The LED driver I intend to use for the 5W LED requires an 12V DC input and outputs 3~10V DC voltage and 680ma current.

    Link: http://www.ebay.com/itm/2pcs-5W-LED...762?pt=LH_DefaultDomain_0&hash=item1c23803fb2

    Will this setup work? Also, if i want to control the brightness of the LED, could I simply stick in a potentiometer at the negative terminal of the LED?

    Thank you!

  2. SgtWookie


    Jul 17, 2007
    That LED is 2-Watts, not 5-Watt. 1.4v x 1.4a = 2 Watts.

    That driver won't work.

    You need a BuckBlock:
    Just what you need; 1400mA supply from as low as 10v input.
    You can dim the output using an 0v-10v input from an inexpensive potentiometer.