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Jon W.: Protection for servo motors using Home Work Board-Breadboard — Parallax Forums

Jon W.: Protection for servo motors using Home Work Board-Breadboard

ArchiverArchiver Posts: 46,084
edited 2004-03-19 20:22 in General Discussion
Thanks Jon:

Four servos caput!!! when I reversed polarity
of the homework stamp.

I will sold 3 diodes one for each wire
(red, black and white (signal) ) ,
I don't if it is too much but four
servos is too much.

Thanks: Joe

--- Jon Williams <jwilliams@p...> wrote:
> You could certainly put diodes (like 1N4001) inline
> with the positive
> side of the supply (keep in mind you'll lose about
> 0.7v through the
> diode) -- but I wouldn't bother. I've reverse
> connected servos more
> than once and never killed them. Are you sure it
> wasn't something else?
>
> -- Jon Williams
> -- Applications Engineer, Parallax
> -- Dallas Office
>
>
>
Original Message
> From: Joe Terk [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=cAPWVKvGC3sScqxAETd2qgGtj5hCEMTaAHfNGR-MpfQQPEsdSNwAOt5-zE3H6r3uhnOfbPfto3ML0Q]joeterk@y...[/url
> Sent: Thursday, March 18, 2004 9:00 AM
> To: basicstamps@yahoogroups.com
> Subject: [noparse][[/noparse]basicstamps] Protection for servo motors
> using Home Work
> Board-Breadboard
>
>
> Hi,.
>
> I damaged two servo motors easily,
> using the Home Work Board-Breadboard.
>
> When I connected the 6 volts power
> supply they burned.
> My mistake was that I reversed the polarity
> for less than one second
> (I know,I know it was my mistake)
>
> The Basic Stamp Home Work Board is working.
> (no problem)
>
> The Board of educations have a mechanical protection
> but I don't want to buy a board of education.
>
> How can I protect the servo motors for a
> reversed polarity?
>
> Diode? or something like that.
>
> Thanks in advance: Joe
>
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Comments

  • ArchiverArchiver Posts: 46,084
    edited 2004-03-19 20:22
    You are over-engineering a solution to a non-problem. Save yourself a
    lot of trouble: just pay attention to how you connect your servos. I'll
    bet that if you solder three diodes into your servo circuit you're going
    to end up with problems.

    -- Jon Williams
    -- Parallax

    Original Message
    From: Joe Terk [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=OStdWJxhV_aoLAIJwYP4PIv4lZ4Cn-SjBRYQBfm7ePjokipdYPL1IW806U4ATWSRQIvvtkaTkwfklUUQ]joeterk@y...[/url
    Sent: Friday, March 19, 2004 1:19 PM
    To: basicstamps@yahoogroups.com
    Subject: [noparse][[/noparse]basicstamps] Jon W.: Protection for servo motors using Home
    Work Board-Breadboard


    Thanks Jon:

    Four servos caput!!! when I reversed polarity
    of the homework stamp.

    I will sold 3 diodes one for each wire
    (red, black and white (signal) ) ,
    I don't if it is too much but four
    servos is too much.

    Thanks: Joe

    --- Jon Williams <jwilliams@p...> wrote:
    > You could certainly put diodes (like 1N4001) inline
    > with the positive
    > side of the supply (keep in mind you'll lose about
    > 0.7v through the
    > diode) -- but I wouldn't bother. I've reverse
    > connected servos more
    > than once and never killed them. Are you sure it
    > wasn't something else?
    >
    > -- Jon Williams
    > -- Applications Engineer, Parallax
    > -- Dallas Office
    >
    >
    >
    Original Message
    > From: Joe Terk [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=OStdWJxhV_aoLAIJwYP4PIv4lZ4Cn-SjBRYQBfm7ePjokipdYPL1IW806U4ATWSRQIvvtkaTkwfklUUQ]joeterk@y...[/url
    > Sent: Thursday, March 18, 2004 9:00 AM
    > To: basicstamps@yahoogroups.com
    > Subject: [noparse][[/noparse]basicstamps] Protection for servo motors
    > using Home Work
    > Board-Breadboard
    >
    >
    > Hi,.
    >
    > I damaged two servo motors easily,
    > using the Home Work Board-Breadboard.
    >
    > When I connected the 6 volts power
    > supply they burned.
    > My mistake was that I reversed the polarity
    > for less than one second
    > (I know,I know it was my mistake)
    >
    > The Basic Stamp Home Work Board is working.
    > (no problem)
    >
    > The Board of educations have a mechanical protection
    > but I don't want to buy a board of education.
    >
    > How can I protect the servo motors for a
    > reversed polarity?
    >
    > Diode? or something like that.
    >
    > Thanks in advance: Joe
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