72 leds with a transformer

Discussion in 'The Projects Forum' started by subbaiah.eee2009, May 4, 2011.

  1. subbaiah.eee2009

    Thread Starter New Member

    May 4, 2011
    2
    0
    hello can any one have any idea about making a photo frame using 72 leds using a transformer.(i dont know the transformer ratings 220/9 v or 220/12 v)

    my photo consists of 72 leds connected already but they are now damaged. I want to make it ready.

    can any body please show the diagram and the components required and what type of leds i have to take
    :rolleyes:
     
  2. Wendy

    Moderator

    Mar 24, 2008
    20,765
    2,536
    What color? It matters.

    Generally you will need several resistors, one for each chain. I recommend a safe high voltage, say 24VDC.

    LEDs, 555s, Flashers, and Light Chasers

    A tutorial on LEDs in chapter 1.
     
  3. subbaiah.eee2009

    Thread Starter New Member

    May 4, 2011
    2
    0
    tahnks for replying
    but the color of leds will be green red and yellow

    dont send any to my mail

    but let me know how to make the circuit by replying me t

    thamk you very much
     
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