motordriver and RC control

Archiver

hello,

I want to use an RC remote control to control a small motor. The receiver
makes an PWM pulse in my opinion, (i can attach a servo that turns left and
right) and i think i can put the PWM pulse in a H-bridge. I guess so far so
good....

How can I make that the motor go in reverse, if i change the control from
going forward to backward?

thanks pieter-jan

_________________________________________________________________
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Archiver

--- In basicstamps@yahoogroups.com, "Pieter-Jan van Diepen"
<diepenpj@h...> wrote:
> hello,
>
> I want to use an RC remote control to control a small motor. The
receiver
> makes an PWM pulse in my opinion, (i can attach a servo that turns
left and
> right) and i think i can put the PWM pulse in a H-bridge. I guess
so far so
> good....
>
> How can I make that the motor go in reverse, if i change the
control from
> going forward to backward?
>
> thanks pieter-jan
>
> _________________________________________________________________
> MSN Search, for accurate results! http://search.msn.nl


Read up more on the H-Bridge. in it's relaxed state, it will drive
one way. but when you energize the direction pins, it reverses the
polarity that goes to the motor and that makes the motor spin
backwards.

Dave




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Archiver

> I want to use an RC remote control to control a small motor. The receiver
> makes an PWM pulse in my opinion, (i can attach a servo that turns left and
> right) and i think i can put the PWM pulse in a H-bridge. I guess so far so
> good....
>
> How can I make that the motor go in reverse, if i change the control from
> going forward to backward?

Two possible solutions:

1) Borrow the guts from an old (mechanically broken) servo. Center the POT
and replace their motor with yours. Pull back RC remote control to reverse,
push forward to go forward; center to stop. done.

2) Run PWM thru power driver; reverse polarity of motor via a relay
(controlled by digital channel of RC)


--
Enjoy,
George Warner,
Schizophrenic Optimization Scientists
Apple Developer Technical Support (DTS)