Subject:
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Re: Hardware Hacking of RCX
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Newsgroups:
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lugnet.robotics.rcx.legos
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Date:
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Thu, 19 Jul 2001 14:13:07 GMT
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Viewed:
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4065 times
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Roy Wood wrote:
(snip)
> The more interesting prospect is adding an additional motor port. I
> know I'd have to add a motor driver at the very least, but it seems
> possible. The fact that there are two unused bits at 0xF000 makes this
> particularly encouraging. Once again, anyone have any comments on this?
(snip)
Hmm...
Heres one idea that'll look REALLY good on your resume :)
Asymmetric Multiprocessing: RCX -> Basic Stamp 2p40
Use the RCX to communicate with a Parallax Basic Stamp. You can use a 5v
regulator and control the Stamp with two RCX output ports. Use
bit-banging (http://www.tuxedo.org/~esr/jargon/html/entry/bit-bang.html)
on two lines to do synchronous serial output. You lose 2 motor outputs
on the RCX, but with a Stamp 2p40 you can get another 15 back - no speed
control, but bidirectional and with brake/float.
Even more elegant is using a /sensor/ port for /output/ - active=1,
passive=0. A simple circuit (6 diodes, a regulator and a capacitor) will
suffice to interface the RCX and the Basic Stamp. You get 15 more
motors, using up any 2 ports (input OR output) on the RCX. Pretty good,
eh?
Happy hacking.
-Jacob
--
"Terminak #3 has bad keyboard. Pkease fix."
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Message is in Reply To:
 | | Hardware Hacking of RCX
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| Considering that LegOS talks directly to the hardware, this seems like a good place to ask the following questions. I am yet again frustrated at having only three inputs and three outputs on my RCX, and am wondering at the possibility of hacking the (...) (25 years ago, 18-Jul-01, to lugnet.robotics.rcx.legos)
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