Digital output of Power Supply

Discussion in 'The Projects Forum' started by usmanali45, Mar 31, 2010.

  1. usmanali45

    Thread Starter New Member

    Mar 3, 2010
    12
    0
    Hellow Dears ,
    I have made a power supply (0-13.5v) range then i want the digital out put 0-13.5v , to achieve this i am using icl7107 with following arrangements but it does not work . All about circuit is shown in attachment .
    PROBLEM!
    1- When i join this circuit to input 5v to ic and with my power supply ,
    the out put varies rendamly .
    2- The out put does not depends up on power supply`s output
     
  2. Bychon

    Member

    Mar 12, 2010
    469
    41
    Hmmm...83 people have looked at at this and none have answered. That usually indicates not enough information.

    It seems you have left out a connection or put some wire in the wrong place. All I can say from here is, the display requires both positive 5 volts and negative 5 volts and a ground wire. Then it needs 2 wires which bring it the voltage you want displayed. From the way the display is wandering, it would seem that a connection is not completed. See if there are 5 wires feeding the display and check for places you think you made a connection but the connection is loose, then report back here.
     
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