LEDs

Discussion in 'Computer Support' started by Ming the Murphyless, Nov 9, 2008.

  1. I need to wire four white LEDs to run off a 12v dc supply (regulated).
    The Vf is 3.2-3.6 The calculation gives a resistor value of 220 ohms for
    2 LEDs in series. Can I wire all four in series without using a
    resistor or are there good reasons for having it? The LEDS will be lit 24/7

    TIA

    Bob
     
    Ming the Murphyless, Nov 9, 2008
    #1
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  2. Ming the Murphyless

    J Guest

    "Ming the Murphyless" <ming@*merciless*littleold.me.uk> wrote in message
    news:bCERk.133901$...
    >I need to wire four white LEDs to run off a 12v dc supply (regulated). The
    >Vf is 3.2-3.6 The calculation gives a resistor value of 220 ohms for 2 LEDs
    >in series. Can I wire all four in series without using a resistor or are
    >there good reasons for having it? The LEDS will be lit 24/7
    >
    > TIA
    >
    > Bob


    http://www.llamma.com/xbox360/mods/How to use an LED.htm

    J
     
    J, Nov 9, 2008
    #2
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