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Circuit to run a stepper motor

Discussion in 'Sensors and Actuators' started by prazz, Dec 6, 2011.

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  1. prazz


    Dec 6, 2011
    Can someone tell me if this will run a 4 wire stepper motor. The circuit board on my telescope drive motor packed up the other night, the motor is ok. Finances wont allow me to buy a replacement, I have all the parts to make this circuit. So I put this together (on paper). To the left of the battery is a 555 driving 4 LED's in sequence, frequency controlled by the pot therefore the speed of the motor To the right are 2 H-bridge. L1 and L2 representing the motor. My small bread board wont accommodate this circuit, I am waiting for a large board to arrive but cant wait so I am asking if this works. I dont do much in the way of electronics so if the diagrams not very well set out or the terminology is poor please excuse me.

    Thanks for looking


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    Last edited: Dec 6, 2011
  2. Resqueline


    Jul 31, 2009
    I'm sorry to say but that circuit won't work at all. Both the H-bridges and the concept of driving them (to suit a stepper motor) is wrong. Here is a working example.
    You can use a 555 to provide clock pulses for that circuit if you like.
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