how to amplify current with a 741?

Discussion in 'Embedded Systems and Microcontrollers' started by toffee_pie, Aug 31, 2010.

  1. toffee_pie

    Thread Starter Active Member

    Oct 31, 2009
    162
    7
    Guys,

    I am trying to amplify current from a 328 atmega and boost it up with a 741, to no avail.

    I have connected resistors to give a Rf/R1 gain of 100, but it doesnt seem to do anything?

    I am getting current ranges from 3mA-30mA from my 328 but this is too small to detail on a scope :(

    thanks.
     
  2. beenthere

    Retired Moderator

    Apr 20, 2004
    15,815
    282
    A 741 op amp is not a power device. It is a voltage amplifier, not one for current. It is also not good for single supply usage.

    What is the application?
     
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