Smallest AC/AC Transformer in the market

Discussion in 'General Electronics Chat' started by Kiken, Jul 3, 2013.

  1. Kiken

    Thread Starter New Member

    Jun 18, 2013
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  2. MrChips

    Moderator

    Oct 2, 2009
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    You can make a very small transformer by winding your own on a ferrite bobbin or toroid. If only we knew what are your specifications.
     
    Last edited: Jul 3, 2013
  3. Kiken

    Thread Starter New Member

    Jun 18, 2013
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    Input 220V 50Hz output should ideally be -2.5v to 2.5v, power doesnt matter, i just intent to get this AC Voltaje into a ADC.
     
  4. crutschow

    Expert

    Mar 14, 2008
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    You probably wouldn't find anything smaller off-the-shelf for 50Hz than the referenced transformer. Smaller, you could do it yourself as MrChips noted.
     
  5. #12

    Expert

    Nov 30, 2010
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    One problem with small transformers is that, for a given input voltage, the smaller it is, the more number of turns of wire are needed. You could get rid of a lot of the voltage with a resistor then wind an isolation transformer as low as 1:1 ratio with only +/- 2.5 volts on the primary. Possibly a tiny audio transformer made for telephone modems? Or wind your own with a lot less number of turns?
     
  6. Kiken

    Thread Starter New Member

    Jun 18, 2013
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    You say is better for me to make a voltage divider first, then to put a transformer in the mix?
     
  7. #12

    Expert

    Nov 30, 2010
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    I told you that a voltage divider would reduce the number of turns that would be required for the transformer to work properly without melting. You decide what is best for you.
     
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