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Ralph Hempel <rhempel@bmts.com> wrote:
> Hi all,
>
> I've finally got my RCX servo driver circuit working. It was
> actually working months ago but I couldn't get the servo to
> stop jittering. Then I swapped in a different servo, and it
> worked like a champ!
>
> <http://www.hempeldesigngroup.com/lego/servos/index.html>
YES! Great job Ralph!
> Before you get all excited, the standard firmware only gets
> you two positions, but the next release of pbForth will
> support much finer resolution.
>
> I also describe modifications to the circuit that let you
> drive two servos from 1 RCX output port if you only need
> to move something and not hold it - like a pneumatic switch
> for instance...
I love this. I could drive up to 6 pneumatic cylinders with a single RCX...
wow!
> Standard servos can be bought for about 12 bucks from any
> hobby store in the big model mags. Micro servos are about
> 20 bucks.
>
> Please read the disclaimer carefully before building this
> circuit, and if you see any errors, let me know ASAP.
>
> As always, feedback, questions, and ridicule are welcomed...
The circuit is very simple to set up even for a non-electronic guy like
myself. Give me just the time to lay my hands on one of those micro servos
and I'll be back with some feedback.
Mario
Web page: http://www.geocities.com/~marioferrari
LUGNET member page: http://www.lugnet.com/people/members/?m=22
Proud member of ItLUG: http://www.itlug.org
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