Help with Boolean logic function

Discussion in 'The Projects Forum' started by Beegil, Mar 16, 2009.

  1. Beegil

    Thread Starter New Member

    Mar 16, 2009
    2
    0
    Im sure this is really easy but im new to this stuff!


    A ventilation system uses three identical temperature sensing devices. Each produces an output equivalent to a ‘logical 1’ when the ambient temperature at that sensor rises above a certain threshold value. These devices are to be used in conjunction with a logic circuit to produce an output which will be used to turn on ventilating fans when two or more of the sensors produce a “1” output.


    I need to write the logic function which defines the operation for this problem, then simplify and implement it using AND & OR gates and finally implement it using just NOR gates.


    Any help would be much appreciated.
     
  2. Beegil

    Thread Starter New Member

    Mar 16, 2009
    2
    0
    ok so ive worked at it for a bit and have simplified :

    V= ABC' + AB'C + A'BC + ABC

    down to:

    V= AB + AC + BC

    and got the circuit using AND & OR gates, but I cant work out how to implement this circuit using just NOR gates.....
     
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