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Electronic Speed Control Help! — Parallax Forums

Electronic Speed Control Help!

ArchiverArchiver Posts: 46,084
edited 2001-05-10 14:47 in General Discussion
Greetings list,

I have bought an Electronic Speed Control and hooked it up to my basic
stamp. It is essentially going to run two electric motors on a monster
truck.

I am trying to give it a pulsout to the pin number, but it is not responding
like a regular servo.

Does anyone have any suggestions?

Karl
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Comments

  • ArchiverArchiver Posts: 46,084
    edited 2001-05-09 23:58
    Some (most) speed controls use an opto-isolator in the inputs that
    requires low impiedance driving. Check with a scope to see the level of
    the pulse when connected. Use a buffer voltage follower to drive if
    needed.
    ACJacques


    Arch- Angel wrote:
    >
    > Greetings list,
    >
    > I have bought an Electronic Speed Control and hooked it up to my basic
    > stamp. It is essentially going to run two electric motors on a monster
    > truck.
    >
    > I am trying to give it a pulsout to the pin number, but it is not responding
    > like a regular servo.
    >
    > Does anyone have any suggestions?
    >
    > Karl
    > _________________________________________________________________
    > Get your FREE download of MSN Explorer at http://explorer.msn.com
    >
    >
    >
    > Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
  • ArchiverArchiver Posts: 46,084
    edited 2001-05-10 00:13
    Might try setting the pin low, then doing the pulsout.
    Original Message

    > I have bought an Electronic Speed Control and hooked it up to my basic
    > stamp. It is essentially going to run two electric motors on a monster
    > truck.
    >
    > I am trying to give it a pulsout to the pin number, but it is not
    responding
    > like a regular servo.
  • ArchiverArchiver Posts: 46,084
    edited 2001-05-10 14:20
    Do you have the correct pulse train?
    You need continually repeating pulses between about 1 and 2 ms, every
    20 ms... although the spacing isn't too critical.
    pm
  • ArchiverArchiver Posts: 46,084
    edited 2001-05-10 14:47
    Yep My pin is set to 'low'

    Karl

    >From: Rodent <daweasel@s...>
    >Reply-To: basicstamps@yahoogroups.com
    >To: basicstamps@yahoogroups.com
    >Subject: Re: [noparse][[/noparse]basicstamps] Electronic Speed Control Help!
    >Date: Wed, 09 May 2001 18:13:18 -0500
    >
    >Might try setting the pin low, then doing the pulsout.
    >
    >
    Original Message
    >
    > > I have bought an Electronic Speed Control and hooked it up to my basic
    > > stamp. It is essentially going to run two electric motors on a monster
    > > truck.
    > >
    > > I am trying to give it a pulsout to the pin number, but it is not
    >responding
    > > like a regular servo.
    >
    >
    >
    >
    >
    >
    >Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
    >
    >

    _________________________________________________________________
    Get your FREE download of MSN Explorer at http://explorer.msn.com
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