4 to 20 ma simulator from 2330Vac

Discussion in 'The Projects Forum' started by ismail8786, Nov 4, 2010.

  1. ismail8786

    Thread Starter New Member

    Nov 4, 2010
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    hi.
    please suggest me the circuit diagram details for desighning a 4 to 20mA simulator from direct 230V ac supply line.
     
  2. Kermit2

    AAC Fanatic!

    Feb 5, 2010
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  3. wayneh

    Expert

    Sep 9, 2010
    12,101
    3,036
    I built a circuit - posted recently by me in this forum - to use a 4-20mA meter I had on hand as a DVM, with which I could then monitor voltage and current in a power supply. The circuit uses a dual op-amp, one amp to provide both an offset to produce 4 mA at zero volts, and the gain. The second amp follows the current in the loop and adjusts to match the signal coming from the first amp.

    Is that what you're looking for? I don't understand what you mean by "simulator".
     
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