measuring the AC current

Discussion in 'General Electronics Chat' started by shoka, Apr 23, 2009.

  1. shoka

    Thread Starter Active Member

    Mar 12, 2009
    i try te measure the ac current by microcontroller.
    i put a 0.1 Ω and take the voltage drop across it.a 1 amp current make 0.1 volt .
    i take it to a diffrence amplifier and then to a step up iron core transformer (100mA, 220/15) it produce 3.4 volt.(it step 0.1 volt to 3.4 ?????????)
    HOW ??
  2. steinar96

    Active Member

    Apr 18, 2009
    say what ?

    Can you please be more specific or post a post a picture of your circuit. It's very hard to understand where you are going and you need to be more precise :)
  3. StayatHomeElectronics

    Well-Known Member

    Sep 25, 2008
    What exactly is your questions? Do you have any experience with circuitry? That seems like a pretty big "HOW?"

    Also, if you are running 1 Amp of current through the transformer, use a core capable of handling the current, you list iron core transformer with 100 mA, 200/15 turns ratio.