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How to test transitor is functioning

Discussion in 'General Electronics Chat' started by eggtree, Nov 28, 2006.

  1. eggtree

    Thread Starter Member

    Nov 28, 2006
    27
    0
    How to test transitor is functioning as a switch?
     
  2. beenthere

    Retired Moderator

    Apr 20, 2004
    15,808
    295
    Hi,

    In circuit, look at the collector voltage. Assuming it's set up as a grounded emitter, the collector voltage should be about the same as Vcc when off, and should be at ground potential when on.

    Out of circuit, use a meter to see if the p-n junctions B to E and B to C are good, plus confirm that there is no conduction E to C.
     
  3. eggtree

    Thread Starter Member

    Nov 28, 2006
    27
    0
    Hi,

    Thanks for your quick response.
     
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