dc voltage control

Discussion in 'The Projects Forum' started by jaykayx4, Jan 15, 2015.

  1. jaykayx4

    Thread Starter New Member

    Jan 15, 2015
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    this is the schematic of a hydraulic system i am trying to control.The trigger (top right,potiniometer) goes
    down to the board(upper left)(on-off switch and proportionary valve)12 volt dc goes to trigger(potentiometer) goes back to board then adjusted voltage to proportionary valve .board is no longer available so i wanted to put an adjustable dc-dc board to control the dc voltage at the proportionary valve.any help would be appreciated upload_2015-1-15_19-14-28.png
     
  2. MaxHeadRoom

    Expert

    Jul 18, 2013
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    If you just want manual control of the valve by pot, you could look one of the power op amps OPA569 for e.g., depends on what the current is required for the valve.
    Max.
     
  3. jaykayx4

    Thread Starter New Member

    Jan 15, 2015
    4
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    ok thanks for the quick responce.its a 12 volt system minimum flow 6 volts ,max 12 volts to the proportionary valve.I am not sure what a opa569 is .
     
  4. MaxHeadRoom

    Expert

    Jul 18, 2013
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  5. jaykayx4

    Thread Starter New Member

    Jan 15, 2015
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    ok it needs to be adjustable constantly(with trigger)to control a coil probably 1-2 amps
     
  6. jaykayx4

    Thread Starter New Member

    Jan 15, 2015
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    0
  7. MaxHeadRoom

    Expert

    Jul 18, 2013
    10,545
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    Looking at the diagram again it does seem that the original was single direction control?
    The unit may work for you, only cost $5.oo to find out.
    Max.
     
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