Aristides: Protection for servo motors using Home Work Board-Breadboard

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Thanks Aristides

but I soldered the diode to the
red cable of the servo and
it worked erratic.

Thanks in advance: Joe
--- Aristides Alvarez <aristidesparallax@y...>
wrote:
> Hello Joe.
>
>
>
> > 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)
>
>
>
> With the BOE you don't have this problem because you
> connect the servos to
> the servo port, making it almost impossible to make
> a bad connection (I said
> almost because you can still reverse connect the
> servo, but this won't
> destroy it).
>
>
>
> With the HomeWork Board you have to make your own
> wiring, leaving the door
> open to reverse polarity and other wiring mistakes.
>
>
>
> The circuit inside the servos is using polarized
> capacitors.
>
> You cannot provide effective external protection to
> avoid reversed polarity
> connection to the servo.
>
> The diode should be added inside the servo case to
> avoid destroying the
> capacitors.
>
>
>
> As you noticed, capacitors get destroyed almost
> instantly when reversing
> polarity.
>
>
>
> The only solution is double and triple checking your
> wiring before applying
> power to the board.
>
>
>
> Saludos,
>
> Aristides Alvarez
>
> International Education Program Developer
>
> aalvarez@p...
>
> Parallax, Inc. www.parallax.com
>
> USA
>
>
>
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