Subject:
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Re: multi-device output controller (fwd)
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Newsgroups:
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lugnet.robotics
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Date:
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Fri, 26 Mar 1999 16:26:31 GMT
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Original-From:
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Bill Flanagan <(bflanagan@mediaone)SayNoToSpam(.net)>
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Viewed:
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3220 times
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How about an RCX to RS232 connection to use off the shelf components?
Check out this link.
http://www.sbsi.net/bin2/hazel.exe?client=59089090&action=serve&item=electro
nics/motor_driver_interfaces.html
MondoTronics sells a simple serial servo contol that services up to 8 motors
via an rs232 port ($49.95). I have seen a simple version adapted for a Palm
Pilot for $89.00 that services 8 servos as well.
To get the multimotor control that you want and MANY other other devices,
all you need is a way to drive an RS232 port on the RCX. Has anyone thought
about how this might be done?
As an example, using a BASIC Stamp 2, you can drive an RS232 port and use
the other 8 lines to contol the I/O to the RCX.
As a new reader of this list (with a Mindstorm set and a Pilot!) I was
wondering whether anyone has already done this. The parts cost using a
Stamp to do this is high; a naked PIC may be a more cost effective solution.
I like the ide that you have but like you, I am not a hardware engineer!
Buy and program is my model.
Thanks for the great idea.
-----Original Message-----
From: Jim Choate <ravage@einstein.ssz.com>
To: lego-robotics@crynwr.com <lego-robotics@crynwr.com>
Date: Thursday, March 25, 1999 11:18 PM
Subject: Re: multi-device output controller (fwd)
>
> ----- Forwarded message from Joel Shafer -----
>
> Date: Thu, 25 Mar 1999 13:43:33 -0600
> From: Joel Shafer <joel@connect.net>
> Subject: Re: multi-device output controller
>
> What about a real time circuit that routed the output power to one of eight
> output ports depending on the PWM. That way it only takes one output port
> on the RCX and up to three (out of 24) motors could be running at the same
> time.
>
> ----- End of forwarded message from Joel Shafer -----
>
> Use the output ports for selection only and use a seperate circuit to • handle
> the pwm. For example, use 1 & 2 as a bank and member select and the third • as
> a clock/amplitude select.
>
> So, if each port has 8 pwm settings that means you could have 64 addresses
> and set each address to one of 8 levels. Of course you'd need 64 pwm
> programmable pulse generators (perhaps a 556 or something similar with a
> digital resistor?).
>
>
> ____________________________________________________________________
>
> The trouble with acting according to your conscience is that
> once you start doing it, nobody can trust you any more.
>
> Alexis A. Gilliland
>
> The Armadillo Group ,::////;::-. James Choate
> Austin, Tx /:'///// ``::>/|/ ravage@ssz.com
> www.ssz.com .', |||| `/( e\ 512-451-7087
> -====~~mm-'`-```-mm --'-
> --------------------------------------------------------------------
> --
> Did you check the web site first?: http://www.crynwr.com/lego-robotics
--
Did you check the web site first?: http://www.crynwr.com/lego-robotics
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