Reducing 25vac to 24vac?

Discussion in 'General Electronics Chat' started by electrick, Feb 20, 2007.

  1. electrick

    Thread Starter New Member

    Feb 20, 2007
    2
    0
    Hi Gentltemen- I hope someone can help me with what I thought would be a simple problem. I need to reduce 25.2vac (200ma) to approx 24 vac. Can I do this with a resistor? Do I need to rectify first? If so, how? I'm quite the novice when it comes to this sort of thing.

    This is for a custom project at my home. The transformer is driving a small solenoid.

    Thank You
    Rick
     
  2. DrNick

    Active Member

    Dec 13, 2006
    110
    2
    If you know the input impedance of the rest of your circuit, you can use a simple voltage divider i think. I would personally use a transformer to step down the voltage. The only thing a rectifier would do is distort your AC signal. I would reccommend simulating your setup using a EM simulator like Sonnet. It is free. You can simulate your solinoid, and or a homebrew transformer in that.
    Here is a link to their page:

    http://www.sonnetusa.com/

    Hope this helps!
     
  3. electrick

    Thread Starter New Member

    Feb 20, 2007
    2
    0
    Very- very cool idea. I had no idea such a site existed. I will definitely check it out.
    Thanks
    Rick
     
  4. nomurphy

    AAC Fanatic!

    Aug 8, 2005
    567
    12
    If the transformer output is 25.2 VRMS and is driving a 24VAC solenoid, you shouldn't have to reduce the voltage at all. I doubt that a 5% voltage difference is significant enough, even across temperature, to overheat the solenoid.
     
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