Add DC offset

Discussion in 'The Projects Forum' started by raptorjp, Apr 17, 2009.

  1. raptorjp

    Thread Starter Member

    Nov 24, 2008
    11
    0
    Hello!

    I have a DC motor drive that takes in 0-12VDC control. The drive only operates at 3-12VDC in practice. I have a control that outputs 0-10VDC. How would I add a constant 2-3VDC offset to my control output?

    I have tried making a simple voltage divider circuit with a potentiometer from a 24VDC power supply and placed that in series with the control output (0-10V) to try to get an input on the motor drive to 2-12V. Is this correct. When I did it I would only get 2-6V output to the drive.

    Any help would be great. Thanks.

    raptorjp
     
  2. bertus

    Administrator

    Apr 5, 2008
    15,648
    2,347
  3. raptorjp

    Thread Starter Member

    Nov 24, 2008
    11
    0
    @Bertus

    Thanks for your reply. I just thought there was an easier way to add voltages without using op-amps. I mean what if I added 2 1.5V AA batteries in series with my 0-10V output?

    Thanks again.

    raptorjp
     
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