how to prevent 2 switch from turning on at the same time?

Discussion in 'Homework Help' started by KaiL, Oct 22, 2015.

  1. KaiL

    Thread Starter Member

    Aug 30, 2014
    57
    0
    This is my current H bridge circuit implemented using BJT. How should I go about so that when 2 switch are turned on at the same time , it will not result in a short circuit.
     
  2. WBahn

    Moderator

    Mar 31, 2012
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    Use a single-pole, double-throw switch.
     
  3. Dodgydave

    Distinguished Member

    Jun 22, 2012
    4,977
    744
    Use a changeover switch, centre to positive, ends to transistors.
     
  4. MaxHeadRoom

    Expert

    Jul 18, 2013
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    You could also use a DPST or DPDT switch with centre off, this way you would have three positions/conditions.
    Max.
     
  5. MikeML

    AAC Fanatic!

    Oct 2, 2009
    5,450
    1,066
    You need to read and understand this forum thread.
     
  6. GS3

    Senior Member

    Sep 21, 2007
    408
    35
    In fact, you can just use the mechanical switch and dump the electronics.
     
  7. MaxHeadRoom

    Expert

    Jul 18, 2013
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    I assumed the wire junctions in the bottom right were some kind of inputs (PWM?).
    Max.
     
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