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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>
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...
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...
Cheers,
Ralph Hempel - P.Eng
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Check out pbFORTH for LEGO Mindstorms at:
<http://www.hempeldesigngroup.com/lego/pbFORTH>
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Reply to: rhempel at bmts dot com
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Message has 2 Replies:
 | | Re: Using Servos with the RCX - Yes!
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| (...) *Very* cool. And not to steal your invention, but it seems to me that TLG could do very well for themselves if they would just sell a standard Lego servo. Something like the same form factor as the 9V geared down technic motor, but with (...) (25 years ago, 10-Feb-00, to lugnet.robotics)
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