Wrecking a stamp.
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I've been succesfully driving a servo with my stamp 2 until yesterday
when something has gone wrong. The last thing I did was drive the
servo at fast speed from left to right continuously - probably quite a
test for the servo mechanics. Anyway, soon after that, the servo
started going wild ie jittering and jumping foward and back, it was
not responding at all to the stamp 2. I though that maybe I had
wrecked the servo. So today I got a new servo, but it too is not being
controlled properly. So now I think it's my stamp that's wrecked.
Is it possible that running a servo backwards and forwards at very
quick intervals could send some back current into the stamp and wreck
it?
Jason
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when something has gone wrong. The last thing I did was drive the
servo at fast speed from left to right continuously - probably quite a
test for the servo mechanics. Anyway, soon after that, the servo
started going wild ie jittering and jumping foward and back, it was
not responding at all to the stamp 2. I though that maybe I had
wrecked the servo. So today I got a new servo, but it too is not being
controlled properly. So now I think it's my stamp that's wrecked.
Is it possible that running a servo backwards and forwards at very
quick intervals could send some back current into the stamp and wreck
it?
Jason
__________________________________________________________________
Get your free Australian email account at http://www.start.com.au
Comments
I don't know how this could hurt the Stamp unless something failed in the
servo electronics and fed back a destructive voltage to the Stamp pin. I
always use a 470 ohm to 1K between the servo and Stamp pin...it doesn't seem
to bother the servos we use and protects the Stamp.
Ray McArthur
> Is it possible that running a servo backwards and forwards at very
> quick intervals could send some back current into the stamp and wreck
> it?
>
>Jason:
>I don't know how this could hurt the Stamp unless something failed in
the
>servo electronics and fed back a destructive voltage to the Stamp
pin. I
>always use a 470 ohm to 1K between the servo and Stamp pin...it
doesn't seem
>to bother the servos we use and protects the Stamp.
>
>Ray McArthur
>
>> Is it possible that running a servo backwards and forwards at very
>> quick intervals could send some back current into the stamp and
wreck
>> it?
I don't know how but my stamp2 just died. Are they very susceptibile
to static electricity? What precautions should I take if they are - I
don't want to wreck my new one too!
Jason
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pin, it should only kill the pin. It may be that your regulator is just
dead. You can try applying 5v steady to the power pins (not the regulator
ones, look at the schemo). Parallax is very good about repairing things. $10
bucks I think.
-William
Original Message
From: Jason 1 <plugger2@s...>
To: <basicstamps@egroups.com>
Sent: Monday, October 16, 2000 3:14 AM
Subject: Re: [noparse][[/noparse]basicstamps] Wrecking a stamp.
> Original message from: "Ray McArthur" <rjmca@u...>
> >
> >Jason:
> >I don't know how this could hurt the Stamp unless something failed in
> the
> >servo electronics and fed back a destructive voltage to the Stamp
> pin. I
> >always use a 470 ohm to 1K between the servo and Stamp pin...it
> doesn't seem
> >to bother the servos we use and protects the Stamp.
> >
> >Ray McArthur
> >
> >> Is it possible that running a servo backwards and forwards at very
> >> quick intervals could send some back current into the stamp and
> wreck
> >> it?
>
>
> I don't know how but my stamp2 just died. Are they very susceptibile
> to static electricity? What precautions should I take if they are - I
> don't want to wreck my new one too!
>
> Jason
>
> __________________________________________________________________
> Get your free Australian email account at http://www.start.com.au
>
>
>
>
>
>Jason:
>I don't know how this could hurt the Stamp unless something failed in the
>servo electronics and fed back a destructive voltage to the Stamp pin. I
>always use a 470 ohm to 1K between the servo and Stamp pin...it doesn't seem
>to bother the servos we use and protects the Stamp.
>
>Ray McArthur
>
> > Is it possible that running a servo backwards and forwards at very
> > quick intervals could send some back current into the stamp and wreck
> > it?
Beau Schwabe IC Mask Designer
National Semiconductor Network Products Division
500 Pinnacle Court, Suite 525 Mail Stop GA1 Norcross, GA 30071
The Stamps are no more or less sensitive than any PIC IC. I always touch my
computer case before touching any breadboards, Stamps, or other ICs and
transistors... have never had a problem, but certainly have had sparks from
my finger when touching the grounded computer case.
Ray McArthur
>
> I don't know how but my stamp2 just died. Are they very susceptibile
> to static electricity? What precautions should I take if they are - I
> don't want to wreck my new one too!
>