Zero Resistance amp meter

Discussion in 'General Electronics Chat' started by vortexflow, Feb 16, 2009.

  1. vortexflow

    Thread Starter New Member

    Feb 16, 2009
    4
    0
    I am trying to figure out the schematics for a zero resistance ampmeter. I cant used a shunt or a clamp type meter since I am measuring no more than 15 mA. and the circuit is an electrochemical cell so if i use any other meter than a (ZRA) I will be playing chicken between voltage value and current generated. I got as far as figuring out that I need an ADC and an OP amp for the circuit. I would appreciate any help on this matter.
    thanks
     
  2. KL7AJ

    AAC Fanatic!

    Nov 4, 2008
    2,040
    287
    What you want is a transimpedance amplifier.

    From the master:

    http://electronicdesign.com/Articles/Index.cfm?AD=1&ArticleID=4346
     
  3. vortexflow

    Thread Starter New Member

    Feb 16, 2009
    4
    0
    Its exactly the circuit I have been looking for.
    Ihank you
     
  4. KL7AJ

    AAC Fanatic!

    Nov 4, 2008
    2,040
    287

    Glad I could help. :)_
     
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