how would i be able to change this?

Discussion in 'The Projects Forum' started by bamaboy30, Dec 2, 2009.

  1. bamaboy30

    Thread Starter New Member

    Dec 2, 2009
    1
    0
    I've found a circuit that ive need but.................
    i need the LED to use its owns battery

    Thank you


    [​IMG]
     
  2. mik3

    Senior Member

    Feb 4, 2008
    4,846
    63
    Give a better explanation.
     
  3. Bernard

    AAC Fanatic!

    Aug 7, 2008
    4,170
    395
    Replace existing LED with optical coupler , might need a transistor to boost output to drive LED.
     
  4. Wendy

    Moderator

    Mar 24, 2008
    20,765
    2,535
    It's depending on the voltage drop of the diodes. You are not using a battery, you are using line voltage. This can be dangerous, caution is important here.

    The LED is an old one, on of the types that use 1.5V dropping. Modern LEDs drop 2.5, you will need more 1N5404 diodes to drop more voltage.
     
Loading...