Stepper driver using only 555

Discussion in 'The Projects Forum' started by ivanmorales, Oct 12, 2009.

  1. ivanmorales

    Thread Starter New Member

    Oct 12, 2009
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    Hello!
    Is there anyway to make a Stepper Motor Driver using only 555 IC's???

    Thanks
     
  2. SgtWookie

    Expert

    Jul 17, 2007
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    It may be possible for a low-power stepper motor, but it would be ugly and awkward.

    It's sort of like "If your only tool is a hammer, everything starts to look more or less like a nail..."

    The best use of a 555 with stepper motors would be to provide a clock, at either a variable or fixed rate, for the driver circuit.
     
  3. Wendy

    Moderator

    Mar 24, 2008
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    As I understand it a stepper has to be sequenced, this is why the multiple leads. There are lots of chips that do that better, you'd have to use a separate 555 for each step. Then there is the problem of reversing direction.

    Stepping motors are not a strong suite of mine however.
     
  4. ivanmorales

    Thread Starter New Member

    Oct 12, 2009
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    Thanks. I understand that it's not efficient, but we are allowed to use only 555 IC on this project. That's why I was asking for that.
    Do you have any idea of the circuit. I've already tried to move my stepper with 4 555, with no success.
    If anybody has an idea to make it work, I'll thank you so much. (Sorry for my bad English)
     
  5. Wendy

    Moderator

    Mar 24, 2008
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    Show us your schematic, and the datasheet of the motor. Otherwise we're just guessing.
     
  6. ivanmorales

    Thread Starter New Member

    Oct 12, 2009
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    Last edited: Oct 12, 2009
  7. Wendy

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    Mar 24, 2008
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    Interesting configuration. What starts the oscillation? I don't see it. I would have used monostables set up as a shift down setup with one oscillator to trigger the arrangment.

    You will have a chaotic situation with all the 555s equal, you need one master, to start the sequenct right.
     
  8. ivanmorales

    Thread Starter New Member

    Oct 12, 2009
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    I touch the 2nd terminal of the 555 with my finger xD.
     
  9. ivanmorales

    Thread Starter New Member

    Oct 12, 2009
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    That's a better idea!! Thanks I'll try using monostables instead of astables.
     
  10. ivanmorales

    Thread Starter New Member

    Oct 12, 2009
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    I've the circuit done. It's not perfect, but works fine (at least while simulating).

    [​IMG]


    Thanks for your help. Your idea of using monostables was the solution.

    Notice that the 2nd 555 has a node that connects its 3rd and 6th terminal. With this connection, the circuit doesn't stuck up.
     
  11. tibbles

    Active Member

    Jun 27, 2008
    249
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    hi ivan
    some of the best drawing ive seen, what are you using?
    if ivans gone, anyone anyone recognise it?
    dougal
     
  12. ivanmorales

    Thread Starter New Member

    Oct 12, 2009
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