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Stepper motor controller with Parallel/serial port interface

Discussion in 'Electronic Basics' started by [email protected], Feb 7, 2005.

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  1. Guest

    Hi all

    I am looking for a stepper motor controller with parallel/serial port
    interface. Anybody know where I can find these?


  2. Bob Masta

    Bob Masta Guest

    Find an old floppy disk drive. The steppers that position the
    heads have a simple interface that can be controlled by
    a few bits on the parallel port. This assumes that you will
    be using the floppy head steppers themselves. They are
    not super-high torque or anything, but I built a little robot
    platform (on a long tether for power and control from the PC)
    that used two 360K floppy controllers and motors. mounted
    on the sides of a cut-down floppy chassis with an added
    3rd-wheel caster. My 10-yr old nephew enjoyed using a
    little BASIC brogram to steer it around the floor.

    Don't recall at the moment which Website had the connection
    info, but if you Google on "floppy stepper" you'll probably
    find it.

    Best regards,

    Bob Masta

    D A Q A R T A
    Data AcQuisition And Real-Time Analysis
  3. sunil

    sunil Guest

    puneet i m also looking for the same if u find any information regarding
    the same please forward it to my mail.
    many thanks in advance.

    kind regards
    sunil kumar


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  4. -john

    -john Guest

    2 bipolar stepper motors can be controlled from the parallel port
    fairly easily, the parallel port doesn't have enough power to drive the
    motors directly (depending on your mobo and motor specs but generally
    not) so you'll need to pick up a motor driver, a quad half H bridge
    works well for bipolar. When I did it I used 2 SN754410NE from TI
    (available in small quantities from digikey for $1.88US) to drive 2
    stepper motors directly from the pc. Software for it is more work than
    the hardware, you'll be doing the stepping manually driving each bit in
    correct order, it's not difficult and can be done in simple scripts but
    integrating into your application can be a pain. Datasheet is
    available on digikey's site and would suggest you read it before laying
    out your system but basically you tie the 4 Y pins to the 4 motor leads
    and the 4 A pins to output on your parallel port (pins 2-10) supply
    appropriate power and ground and you're ready to go. Let us know how
    it goes for you.

  5. John

    John Guest

    Look at the various kits available from

    On Thu, 18 Aug 2005 10:52:37 GMT,
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