controlling servos with STAMP micros
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Posts: 46,084
Hi,
I am trying to convert a monster truck (rc car), into a rc-less toy,
using the STAMP micros, however i need to have a driving mechanism
in place to move this car around, knowing that these cars operate at
27 or 47 Mhz range, i was wondering if there is any way that i could
connect the micro to the receiver's antenaa and be producing those
pulses directly to the receiver's circuit. first i probably should
capture the control pulses from the controller then be able to
implement them on the micro. also i know that the micro can produce
pulses in kHz range only. how to overcome this? does this strategy
sound sane? any suggestions or corections?
Thank You
Souhail
I am trying to convert a monster truck (rc car), into a rc-less toy,
using the STAMP micros, however i need to have a driving mechanism
in place to move this car around, knowing that these cars operate at
27 or 47 Mhz range, i was wondering if there is any way that i could
connect the micro to the receiver's antenaa and be producing those
pulses directly to the receiver's circuit. first i probably should
capture the control pulses from the controller then be able to
implement them on the micro. also i know that the micro can produce
pulses in kHz range only. how to overcome this? does this strategy
sound sane? any suggestions or corections?
Thank You
Souhail
Comments
here: http://www.pololu.com/products/pololu/0401
You just hook up the existing motors to it and then figure out your R/C
stuff.
-Mike
Original Message
From: s4souhail [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=gSzfi_JQOpOQq0_hhky7LEmbcRwOpdGZRG2R45UwkWbpN5lYXi72vmsUnQCelQbjDuNQNNYE0XNYhg]s4souhail@y...[/url
Sent: Wednesday, April 30, 2003 1:28 PM
To: basicstamps@yahoogroups.com
Subject: [noparse][[/noparse]basicstamps] controlling servos with STAMP micros
Hi,
I am trying to convert a monster truck (rc car), into a rc-less toy,
using the STAMP micros, however i need to have a driving mechanism
in place to move this car around, knowing that these cars operate at
27 or 47 Mhz range, i was wondering if there is any way that i could
connect the micro to the receiver's antenaa and be producing those
pulses directly to the receiver's circuit. first i probably should
capture the control pulses from the controller then be able to
implement them on the micro. also i know that the micro can produce
pulses in kHz range only. how to overcome this? does this strategy
sound sane? any suggestions or corections?
Thank You
Souhail
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motor is stalled. I would suggest hacking the board that came with the car
and supplying the control pulses or whatever in place of the receiver. This
way you keep the motor control circuit that you know already works with
those motors.
Original Message
> Why don't you use the Pololu Micro Dual serial motor controller? Found
> here: http://www.pololu.com/products/pololu/0401
> You just hook up the existing motors to it and then figure out your R/C
> stuff.
> I am trying to convert a monster truck (rc car), into a rc-less toy,
> using the STAMP micros, however i need to have a driving mechanism
> in place to move this car around, knowing that these cars operate at
> 27 or 47 Mhz range, i was wondering if there is any way that i could
> connect the micro to the receiver's antenaa and be producing those
> pulses directly to the receiver's circuit. first i probably should
> capture the control pulses from the controller then be able to
> implement them on the micro. also i know that the micro can produce
> pulses in kHz range only. how to overcome this? does this strategy
> sound sane? any suggestions or corections?
in frequency. You want to connect the micro to the decoded receive
inputs, not the antenna inputs.
You can use, among other things, a PAK-VIII
(http://www.al-williams.com/pak8.htm) to control a servo (actually up to
8 servos). Have a look at the examples we provide for that chip (for
example http://www.al-williams.com/servobot.htm) to get an idea about
how that works.
Hope that helps.
Regards,
Al Williams
AWC
* Floating point A/D
http://www.al-williams.com/awce/pak9.htm
>
Original Message
> From: s4souhail [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=mO0kKIMVyvmJwTpxh-3EoekvGIz2nZ-OBWJ-mnvZp16_wAiqnIM7vceVPUsHHgPmpsYMYR1UafFuqg]s4souhail@y...[/url
> Sent: Wednesday, April 30, 2003 12:28 PM
> To: basicstamps@yahoogroups.com
> Subject: [noparse][[/noparse]basicstamps] controlling servos with STAMP micros
>
>
> Hi,
> I am trying to convert a monster truck (rc car), into a rc-less toy,
> using the STAMP micros, however i need to have a driving mechanism
> in place to move this car around, knowing that these cars operate at
> 27 or 47 Mhz range, i was wondering if there is any way that i could
> connect the micro to the receiver's antenaa and be producing those
> pulses directly to the receiver's circuit. first i probably should
> capture the control pulses from the controller then be able to
> implement them on the micro. also i know that the micro can produce
> pulses in kHz range only. how to overcome this? does this strategy
> sound sane? any suggestions or corections?
>
> Thank You
> Souhail
>
>
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>
>
connect it the circuit that comes after the decoder, which controllers the
motors. (bypass the decoder)?
Thanks
Rodent <daweasel@s...> wrote:Some of the motors they use on the RC cars
can pull alot of current when the
motor is stalled. I would suggest hacking the board that came with the car
and supplying the control pulses or whatever in place of the receiver. This
way you keep the motor control circuit that you know already works with
those motors.
Original Message
> Why don't you use the Pololu Micro Dual serial motor controller? Found
> here: http://www.pololu.com/products/pololu/0401
> You just hook up the existing motors to it and then figure out your R/C
> stuff.
> I am trying to convert a monster truck (rc car), into a rc-less toy,
> using the STAMP micros, however i need to have a driving mechanism
> in place to move this car around, knowing that these cars operate at
> 27 or 47 Mhz range, i was wondering if there is any way that i could
> connect the micro to the receiver's antenaa and be producing those
> pulses directly to the receiver's circuit. first i probably should
> capture the control pulses from the controller then be able to
> implement them on the micro. also i know that the micro can produce
> pulses in kHz range only. how to overcome this? does this strategy
> sound sane? any suggestions or corections?
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[noparse][[/noparse]Non-text portions of this message have been removed]
receiver and feed the control pulses to the motor controllers directly. If
this is a cheap RC car with simple forward / reverse / left / right control
(the steering and speed are either on or off,), it will be different.
Original Message
> Hi,So you are saying instead of connecting the micro to the decoder, i
should connect it the circuit that comes after the decoder, which
controllers the motors. (bypass the decoder)?
Some of the motors they use on the RC cars can pull alot of current when the
> motor is stalled. I would suggest hacking the board that came with the car
> and supplying the control pulses or whatever in place of the receiver.
This
> way you keep the motor control circuit that you know already works with
> those motors.
>
>
>
Original Message
>
>
> > Why don't you use the Pololu Micro Dual serial motor controller? Found
> > here: http://www.pololu.com/products/pololu/0401
> > You just hook up the existing motors to it and then figure out your R/C
> > stuff.
>
> > I am trying to convert a monster truck (rc car), into a rc-less toy,
> > using the STAMP micros, however i need to have a driving mechanism
> > in place to move this car around, knowing that these cars operate at
> > 27 or 47 Mhz range, i was wondering if there is any way that i could
> > connect the micro to the receiver's antenaa and be producing those
> > pulses directly to the receiver's circuit. first i probably should
> > capture the control pulses from the controller then be able to
> > implement them on the micro. also i know that the micro can produce
> > pulses in kHz range only. how to overcome this? does this strategy
> > sound sane? any suggestions or corections?
>
>
>
>
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Body of the message will be ignored.
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>
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