Question about transformers

Discussion in 'The Projects Forum' started by Kylelem62, Mar 19, 2013.

  1. Kylelem62

    Thread Starter New Member

    Mar 19, 2013
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    So I need transformers for some high output led lights that I am going to start selling. I need somewhere from 32-36 volts from 120 vac. I can not find any transformers that have the proper ratio. The transformer must be able to handle 3 amps. How would I go about winding one? What materials would I need to get. I would prefer to purchase in bulk (50ish). Any help would be greatly appreciated.
     
  2. crutschow

    Expert

    Mar 14, 2008
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    How about this one for example. I'm sure there are others.
     
  3. Kylelem62

    Thread Starter New Member

    Mar 19, 2013
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    That is much to expencive/large/heavy. I am looking for something smaller, and less expensive. I am looking for something cheap, I don't mind winding my own, if someone could instruct me how.
     
  4. MrChips

    Moderator

    Oct 2, 2009
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    You don't wind your own mains transformer unless you are willing to set your house on fire.
    You better start shopping around for a transformer.
     
  5. Kylelem62

    Thread Starter New Member

    Mar 19, 2013
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    Have been, can't find one to the specs. only other thing I can think of is a huge-ass voltage divider with ceramic resistors+heatsink+fan... But thats a little wasteful.
     
  6. MrChips

    Moderator

    Oct 2, 2009
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  7. crutschow

    Expert

    Mar 14, 2008
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    Mains power transformers are big, heavy, and expensive, there's no getting around that. And winding your own is really not practical.

    Instead you could use a main's powered switching regulator circuit, such as one of these, that uses much smaller transformers for the same power. But they won't necessarily be cheap either.
     
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