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I need somemore help! — Parallax Forums

I need somemore help!

ArchiverArchiver Posts: 46,084
edited 2002-10-18 16:23 in General Discussion
alright, I'm on to stepper motors, I have a uni-polar 6 wired stepper motor,
I understand I need to run my stamp pin through a transistor in order to
increase the current, but I'm not sure of the setup, like I don't know what
wires to connect to on my motor, I know that the 2 reds are common and the
colours of the different stages, but I don't the know where I connect the
collector of the transistor, that kinda stuff!

so any info would be great!

Thanks alot Brad






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Comments

  • ArchiverArchiver Posts: 46,084
    edited 2002-10-18 01:43
    Brad,

    For interfacing outputs, the ULN2803 IC makes it simple. I don't know how
    big your stepper is, but this IC will drive small steppers, and you can
    always parallel it's outputs for additional current gain. I use them now
    whenever I am interfacing an output from my basic stamp projects to protect
    the stamp.

    I don't know much about stepper motors, so I can't help you there, but I
    will be following this thread to see what I can learn about them.

    Here is a link to a data sheet on the ULN2803

    http://www.onsemi.com/pub/Collateral/ULN2803-D.PDF

    Regards,

    Dwain.
    Original Message
    From: "Brad Hughson" <willkirby69@h...>
    To: <basicstamps@yahoogroups.com>
    Sent: Friday, October 18, 2002 10:16 AM
    Subject: [noparse][[/noparse]basicstamps] I need somemore help!


    >
    >
    > alright, I'm on to stepper motors, I have a uni-polar 6 wired stepper
    motor,
    > I understand I need to run my stamp pin through a transistor in order to
    > increase the current, but I'm not sure of the setup, like I don't know
    what
    > wires to connect to on my motor, I know that the 2 reds are common and the
    > colours of the different stages, but I don't the know where I connect the
    > collector of the transistor, that kinda stuff!
    >
    > so any info would be great!
    >
    > Thanks alot Brad
    >
    >
    >
    >
    >
    >
    > _________________________________________________________________
    > Unlimited Internet access for only $21.95/month. Try MSN!
    > http://resourcecenter.msn.com/access/plans/2monthsfree.asp
    >
    >
    > To UNSUBSCRIBE, just send mail to:
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    Body of the message will be ignored.
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    >
    >
  • ArchiverArchiver Posts: 46,084
    edited 2002-10-18 16:23
    Brad,

    See the Parallax Stamp1 Application Note 6: A Stepper Motor Controller.
    It uses a ULN2003, which has 7 Darlington transistor drivers, but you
    can also use the ULN2803, with 8 drivers, as Dwain suggested. In my
    application, I added an extra relay to switch the motor current ON/OFF,
    using a stamp pin and one of the unused ULN drivers to drive the relay.

    Dennis
    Original Message
    From: Dwain J. Hill [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=MeLTdwPFWasfV06wBjZqzB8eB7E8hluCBAUvX5YDEwGswqGW5xykwlfrVgsZ7RjzENXao4kzXm2wv29klg]asdfghjk@b...[/url
    Sent: Thursday, October 17, 2002 5:43 PM
    To: basicstamps@yahoogroups.com
    Subject: Re: [noparse][[/noparse]basicstamps] I need somemore help!


    Brad,

    For interfacing outputs, the ULN2803 IC makes it simple. I don't know
    how big your stepper is, but this IC will drive small steppers, and you
    can always parallel it's outputs for additional current gain. I use them
    now whenever I am interfacing an output from my basic stamp projects to
    protect the stamp.

    I don't know much about stepper motors, so I can't help you there, but I
    will be following this thread to see what I can learn about them.

    Here is a link to a data sheet on the ULN2803

    http://www.onsemi.com/pub/Collateral/ULN2803-D.PDF

    Regards,

    Dwain.
    Original Message
    From: "Brad Hughson" <willkirby69@h...>
    To: <basicstamps@yahoogroups.com>
    Sent: Friday, October 18, 2002 10:16 AM
    Subject: [noparse][[/noparse]basicstamps] I need somemore help!


    >
    >
    > alright, I'm on to stepper motors, I have a uni-polar 6 wired stepper
    motor,
    > I understand I need to run my stamp pin through a transistor in order
    > to increase the current, but I'm not sure of the setup, like I don't
    > know
    what
    > wires to connect to on my motor, I know that the 2 reds are common and

    > the colours of the different stages, but I don't the know where I
    > connect the collector of the transistor, that kinda stuff!
    >
    > so any info would be great!
    >
    > Thanks alot Brad
    >
    >
    >
    >
    >
    >
    > _________________________________________________________________
    > Unlimited Internet access for only $21.95/month. Try MSN!
    > http://resourcecenter.msn.com/access/plans/2monthsfree.asp
    >
    >
    > To UNSUBSCRIBE, just send mail to:
    > basicstamps-unsubscribe@yahoogroups.com
    > from the same email address that you subscribed. Text in the Subject
    > and
    Body of the message will be ignored.
    >
    >
    > Your use of Yahoo! Groups is subject to
    > http://docs.yahoo.com/info/terms/
    >
    >


    To UNSUBSCRIBE, just send mail to:
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