H Bridge with Braking

Discussion in 'The Projects Forum' started by ayushextreme, Apr 18, 2014.

  1. ayushextreme

    Thread Starter New Member

    Apr 10, 2014
    19
    0
    I wanted to make an H bridge which was capable of braking the motors. I came across Bob blick's design and tried it on breadboard, I also tried his PCB. So far only the motors turns in one direction on supplying input IN A as in his diagram, IN B is not working. Did anyone try out this circuit before? Someone please verify it.

    http://bobblick.com/techref/projects/hbridge/hbridge.html
     
  2. MaxHeadRoom

    Expert

    Jul 18, 2013
    10,498
    2,364
    There seems no reason why both sides would not work, they are identical?
    Max.
     
  3. ScottWang

    Moderator

    Aug 23, 2012
    4,848
    767
    1. Exchange the bjts from left to right and right to left, separate high side and low side, exchange twice.
    2. measure the voltage of each pin of bjts for Q1,Q5,Q4,Q8.
     
    Last edited: Apr 18, 2014
  4. ayushextreme

    Thread Starter New Member

    Apr 10, 2014
    19
    0
    The circuit works fine and the transistors dont heat up when both inputs are one. Sorry!
     
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