1. Apr 24, 2009 #1

   U4edot

   

   I know you can use fueses, switches, and circuit breakers.
   But is it possible to use a logic circuit to break a circuit path?

    

   U4edot, Apr 24, 2009
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3. Apr 24, 2009 #2

   berkeman

   

   Staff: Mentor

   Sure. Depends on what you mean by "break", though. You can use multiplexers (MUXes) to select which logic signal you want to route into another circuit, for example. You can use logic gates to enable or disable a signal continuing on. You can use a Tri-State output gate to enable or disable a signal from continuing on....

    

   berkeman, Apr 24, 2009
4. Apr 24, 2009 #3

   U4edot

   

   Say I want to use a logic circuit to break the power supply of another electrical component.

    

   U4edot, Apr 24, 2009
5. Apr 24, 2009 #4

   U4edot

   

   OK, I read a bit on Wikipedia
   Does anyone know if a demultiplexer can handle AC current?

    

   U4edot, Apr 24, 2009
6. Apr 24, 2009 #5

   Bob S

   

   There are triacs specifically designed to handle AC voltages and currents. There are optocouplers that permit using floating (electrically isolated) logic signals to trigger the triacs.

    

   Bob S, Apr 24, 2009
7. Apr 24, 2009 #6

   U4edot

   

   Thanks for the input I'll look at this when I get off work

    

   U4edot, Apr 24, 2009

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