Control Motor Speed and count at the same time?
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Posts: 46,084
Can anybody tell me wether or not any of the basic stamps are capable
of allowing me to use PWM to control the speed of a DC Motor, via a H-
Bridge, and count pulses from an encoder at the same time? This is
for a two axis robot system that I would like to build.
Dan
of allowing me to use PWM to control the speed of a DC Motor, via a H-
Bridge, and count pulses from an encoder at the same time? This is
for a two axis robot system that I would like to build.
Dan
Comments
Stamps and PAKs to do what you want. In particular:
PAK-IV - a PAK-IV (or a PAK-III) can generate PWM like the Stamp does (a
burst of proportional pulses) or count like the Stamp does. It too only does
one thing at a time, but the Stamp and the PAK-IV can both do one thing each
at a time.
PAK-V - The PAK-V generates 8 channels of 8-bit PWM at the same time without
stopping. The Stamp can send a command to the PAK-V and change the PWM rate.
It never stops or hiccups even when the Stamp sends commands (unless you
send the command to turn off a channel, of course, at which point it stops
that channel).
PAK-VII - The PAK VII can measure pulse width and count pulses (on 8
channels) in a very flexible way without intervention from the Stamp. The
Stamp simply reads the pulses when it is ready.The counts go to 16 bits.
The other alternative would be to use a counter and shift register to count
the pulses and shift them into the Stamp a bit at a time. This is more or
less what the PAK-VII is, but it also measures pulse widths and does 8
channels at once!
You can read the manuals for these at
http://www.al-williams.com/awce/doclib.htm
Regards,
Al Williams
AWC
* Floating point math for the Stamp, PIC, SX, or any microcontroller at
http://www.al-williams.com/awce/pak1.htm
>
Original Message
> From: mcruz1@t... [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=oDOCmv1rrGEpMgEGRJ26hEF0AD7iLnVvEgYAhdotIQrkGveOXidJxVtdJXDq6rsevTzisXPyshFR]mcruz1@t...[/url
> Sent: Sunday, October 08, 2000 9:42 AM
> To: basicstamps@egroups.com
> Subject: [noparse][[/noparse]basicstamps] Control Motor Speed and count at the same time?
>
>
> Can anybody tell me wether or not any of the basic stamps are capable
> of allowing me to use PWM to control the speed of a DC Motor, via a H-
> Bridge, and count pulses from an encoder at the same time? This is
> for a two axis robot system that I would like to build.
>
> Dan
>
>
>