Detecting solenoid ON and OFF state

Discussion in 'The Projects Forum' started by Prakash Scientist, Jun 23, 2016.

  1. Prakash Scientist

    Thread Starter New Member

    Dec 19, 2012
    6
    0
    I want to detect solenoid ON and OFF state.
    If solenoid ON, with respect to HIGH signal no problem.
    If solenoid not working means with respect to HIGH signal, solenoid remains OFF state. In that situation I have to generate HIGH or LOW signal.
    So I designed a circuit with XOX gate attached here.
    I have to detect 128 solenoid ON/OFF state.
    My question is, this circuit is will withstand for 128 solenoid?
    If not means any other solution?
     
  2. Alec_t

    AAC Fanatic!

    Sep 17, 2013
    5,802
    1,105
    Should work ok.
    If the pull-up voltage is <= the logic supply voltage then you may not need the resistor on pin 1.
    If a single status indication will suffice for all the solenoids then you could diode-OR the pin 2 inputs and avoid having to use 128 gates.
     
  3. Prakash Scientist

    Thread Starter New Member

    Dec 19, 2012
    6
    0
    Thank you. With your suggestion I have to change my circuit.
     
  4. Prakash Scientist

    Thread Starter New Member

    Dec 19, 2012
    6
    0
    See my second circuit and give your suggestion. Why I checking solenoid state means, any how it may not work in some instances. At that time I have to stop this process.
     
  5. Alec_t

    AAC Fanatic!

    Sep 17, 2013
    5,802
    1,105
    Looks ok.
     
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