Where to buy a certain type of transformer?

Discussion in 'General Electronics Chat' started by mahmoud899, Mar 17, 2013.

  1. mahmoud899

    Thread Starter New Member

    Mar 14, 2013
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    Hello, I am looking for a small step down transformer, which intakes 230VAC and outputs 24VAC. The important thing is that I want the transformer to be as small as possible, I have attached a picture of the size of the transformer that I want to buy. The question is where can I buy one from? please supply me with websites.

    Thank You

    [​IMG]
     
  2. BillB3857

    Senior Member

    Feb 28, 2009
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  3. crutschow

    Expert

    Mar 14, 2008
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    I assume you are talking about line powered transformers. Chances are most of those small transformers shown are for switching power supplies, which operate at a much higher frequency. The amount of iron required for a line powered transformer generally makes them larger than that (iron required is roughly inversely proportional to operating frequency). So you might consider a line powered switching regulator if you must keep the transformer size small.
     
  4. bountyhunter

    Well-Known Member

    Sep 7, 2009
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    Not including the RMS current rating makes selection impossible.
     
  5. wmodavis

    Well-Known Member

    Oct 23, 2010
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    "small step down transformer"

    Small means low power. You didn't specify power.
    "Small" is relative. You didn't include dimensions.
    Buy exactly what you want from a store or dealer. Most have web sites.

    Sorry if my response wasn't any more helpful then your question but....
     
  6. charliewilde

    New Member

    Mar 13, 2013
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    There are many kind of transformer and it is contains of different purposes. Transformer are important to the big power grid it also responsible for transmitting power voltage. However,there are many small types of transformer, can you be specify which one you need?
     
  7. thatoneguy

    AAC Fanatic!

    Feb 19, 2009
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    As stated by others, the transformers in your photo are mostly ferrite core.

    For line frequency of 50 or 60Hz, Iron laminated cores are used. This makes them very heavy and rather large.

    Specifications need current or VA (Volt-Amps) in addition to voltage/turns ratio.

    To use the physically smaller transformers, you'll need a switching power supply to increase the frequency. Direct line SMPS are a non-trivial design task, relative to the "standard" iron core transformers.
     
  8. #12

    Expert

    Nov 30, 2010
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    Metalmann likes this.
  9. K3CFC

    New Member

    Dec 4, 2012
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    These kind of transformers are found in flat screen tv's google jestine yong and get his email addy and ask him. he has helped me in the past.
     
  10. Metalmann

    Active Member

    Dec 8, 2012
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  11. GopherT

    AAC Fanatic!

    Nov 23, 2012
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    Assuming you only need one, You can also go to a junk store and but an old clock radio, clock or digital thermometer type of junk. Take it home and start desoldering. Cheaper than any reasonable transformer from mouser.
     
  12. mahmoud899

    Thread Starter New Member

    Mar 14, 2013
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    Thank you all for the replies, they have been very helpful
     
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