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 17:08:43 GMT
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Original-From:
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Jim Choate <ravage@/antispam/EINSTEIN.ssz.com>
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Viewed:
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997 times
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----- Forwarded message from Jim Choate -----
From: Jim Choate <ravage@ssz.com>
Subject: Re: multi-device output controller (fwd)
Date: Fri, 26 Mar 1999 10:34:22 -0600 (CST)
It's actualy pretty easy. Take the analog RCX output, integrate, S&H, A/D,
serialize and then send to a MAX232 devices and wallah, RS-232.
----- End of forwarded message from Jim Choate -----
Obviously that should be PWM RCX output. Sorry, I mis-typed because I was
thinking of another way to convert the signal.
Take the output and look for every positive going edge. Then start a clock
that counts until the falling edge. It would get stored and the counter
would be cleared for the next positive going edge. The number could be fed
to a digital resistor and create an analog output via some sort of R-2R
network. You could also send the number directly to the RS-232 as data and let
the software convert it to a usable value. Since the PRR of the PWM output
would be known, as well as the counter rate, it becomes reasonably easy to
calculate what the effective signal is.
____________________________________________________________________
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 --'-
--------------------------------------------------------------------
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Did you check the web site first?: http://www.crynwr.com/lego-robotics
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