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Discussion in 'General Electronics Discussion' started by pete g, May 20, 2013.

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  1. pete g

    pete g

    Sep 14, 2010
    hi all, i'am planning on building a power supply. i;am going to use two meters(analog) for volts and amps. my question is, is the voltmeter hooked up before the ammeter or vice versa? i know the ammeter is hooked in series with output while the voltmeter is in parallel but don't know which comes first.
  2. glewis721


    Apr 30, 2013
    how many Ωs does the ammeter have?
    if the resistance is low enough, then it shouldn't matter.
    keep in mine that i am making a guess and dont know if i am right or not.
    you will need follow-up answers
  3. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

    Jan 21, 2010
    If you place the voltmeter after the ammeter, the voltmeter will read the load voltage.

    However, if this is a concern, the ammeter is also going to affect voltage regulation, albeit by a small amount.

    glewis, well spotted, that is the concern -- your guess was pretty good this time ;)
  4. pete g

    pete g

    Sep 14, 2010
    hi, the ammeter is 2.5k ohms. i ma. i want to scale it read 100ma, 1a. will the res value cause problems, i would guess yes. how can i overcome those problems short of using another meter.
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