Needing micro amp transducer circuit

Discussion in 'General Electronics Chat' started by eeckert, Apr 23, 2006.

  1. eeckert

    Thread Starter New Member

    Apr 23, 2006
    1
    0
    I need a simple circuit to measure -1.0 mA - +1.0 mA and produce a -10 - +10 VDC output that is linear. $250.00 USD via Paypal upon reception of an accepted schematic, $250.00 USD after PCB proven functional. Much future work for sound legible designs.
    eeckert@thirdcoastautomation.com
     
  2. Grant

    Member

    Mar 5, 2006
    17
    0
    Choose me!
    I will pay USD750.00 plus a free holiday and set of steak knives for this circuit!
    Grant
     
  3. kubeek

    AAC Fanatic!

    Sep 20, 2005
    4,670
    804
    +-1mA AC or DC? How big precision xou need?
     
  4. paultwang

    Well-Known Member

    Mar 8, 2006
    80
    0

    I kind of wonder where he get this ±1 mA current source from. Any device under test is going to be disturbed by the test equipment (the amplifier in this case). What if the input impedance of the amplifier is 1 meg? Is the DUT going to put out 1kV? ;)
     
  5. paultwang

    Well-Known Member

    Mar 8, 2006
    80
    0

    1 mA across a 1 k resistor generates 1 volt. Using an opamp to amplify that 10 times.


    V3 would be the DUT. The voltmeter pin indicates the output. The ampmeter is placed on the resistor R2. That's a 741 chip, replaceable with opamp of your choice. I would put something with higher impedance and lower DC offset.
     
  6. paultwang

    Well-Known Member

    Mar 8, 2006
    80
    0
    Since the OP did not specify what he is going to measure, this is all guesswork.
     
  7. windoze killa

    AAC Fanatic!

    Feb 23, 2006
    605
    24
    This is sooooooooo easy. Surely you don't have to pay for it.

    PS. How can we be guarenteed we get paid?
     
Loading...