120VAC Input 196 LED Driver

Discussion in 'The Projects Forum' started by wierbo, Oct 12, 2014.

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  1. wierbo

    Thread Starter New Member

    Oct 12, 2014
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    I currently have a LED board with no power supply. The board has 49 LEDs in series that is then in parallel with 3 other series of the same LEDs. This makes up 196 lights in all.

    Does anyone have a schematic that would drive this board; with a 120v AC input?

    Thanks for any help or insight.
     
  2. mcgyvr

    AAC Fanatic!

    Oct 15, 2009
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    desired DC output voltage (or max sum of the forward voltage in each string)?
    desired current?
     
  3. wierbo

    Thread Starter New Member

    Oct 12, 2014
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    The power needs to be 9 watts. I am uncertain the output voltage needed to run this array.
     
  4. Bernard

    AAC Fanatic!

    Aug 7, 2008
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    Sounds like 120 V AC rectified. Is there any other electronics on back of board? Any polarity markings? Color pf LEDs?
     
  5. panic mode

    Senior Member

    Oct 10, 2011
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  6. wierbo

    Thread Starter New Member

    Oct 12, 2014
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    How so?
     
  7. Bernard

    AAC Fanatic!

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    Not if he uses an isolation transformer
     
  8. MrChips

    Moderator

    Oct 2, 2009
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    All About Circuits does not encourage or endorse experimenting or even discussion of any circuit applications that connect directly to AC mains.
    Without the use of an isolation transformer there is serious risk of physical harm and electrocution. Hence this thread will be closed should you continue this thread without the use of an isolation transformer.
     
    RRITESH KAKKAR likes this.
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