Multiple sensor voltages

Discussion in 'General Electronics Chat' started by Dollarday, Dec 14, 2012.

  1. Dollarday

    Thread Starter Active Member

    Jan 25, 2012
    Hi everyone, :cool:

    I would like to know, if you have multiple sensor output voltages between two wires (+ and -), is there a way to "output" all the voltage outputs on the same line without damaging the sensors?

    For example:
    Sensor A outputs 1V
    Sensor B outputs 4V
    Sensor C outputs 3V

    There is a circuit after each sensor to ensure that none of the sensors receives reverse current but does not result in a voltage drop.

    So, (thanks to Kirchoff), if a voltmeter measures the wires, it should measure a voltage of 4V

    Can you use a voltage buffer OP-AMP circuit to achieve this or is there another way to achieve this without a diode?

  2. SPQR


    Nov 4, 2011
    I think we might need more information.

    How would you differentiate between the three sensors at the other end of the line?
    A cyclic timer?
    Are the sensors Yes/No? or are they 0 to 1V, 0 to 3v, 0 to 4V?
  3. ramancini8

    Active Member

    Jul 18, 2012
    It sounds like you need a mux to connect one sensor while the others are disconnected.