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Subject: 
Questions about unoficial (?) use of electrical LEGO parts
Newsgroups: 
lugnet.robotics
Date: 
Tue, 29 Feb 2000 17:55:33 GMT
Original-From: 
Marco C. <MARCO@SOPORCEL.nomorespamPT>
Viewed: 
733 times
  
Well, before I go ahead and try it, I would like to get some feedback on
the following (some naive) questions:

1) Is there any risk of damaging the Fiber Optic Light Unit (#6637) if I
connect it to a pBrick (RCX, CiberMaster, etc) OUTPUT port ?

2) This seems to be a very stupid question, but... Could I connect an
OUTPUT port of a pBrick (CiberMaster) to an IN port of another pBrick (ex:
RCX) ?

All these weird questions are related to the fact that I need my
CiberMaster to pass along messages it receives through RF to other pBricks
fisically attached to it (multi pBrick bot/rover). Once the "request" is in
a Mindstorms pBrick domain, *with IR*, then all the msgs could be sent
through "normal" IR between the rest of the pBricks.

The cenario is this:

CiberMaster (pBrick A):
- is the one that does all the comms with the PC through RF.
(RF = One of the reasons behind the use of a CiberMaster)
- is in charge of the mobility of the bot.
(already has the 2 motors in a "vehicle" position, might as well use them)
- transmits commands to another pBrick B (ex: Scout or RCX+LightSensor)

pBrick B:
- is in charge of controlling the tilt/roll of a Cam using 2 motors
- will *retransmit* through IR, commands to other possible pBricks (C,D,...)
(functioning as an interface between CiberMaster and other IR enabled
pBricks)

pBrick C, D, ...:
- receive the IR requests and act accordingly, for example, as a robotic
arm controller, etc...


All this trouble because of the lack of enough OUTPUT (and INPUT) ports.

Any comments ?
____________________
Marco C. aka McViper



Message has 6 Replies:
  Re: Questions about unoficial (?) use of electrical LEGO parts
 
(...) I havn't tried it (cause I don't have the Cybermaster :/ ) but Bert Van Dam put on his wonderful page instructions on doing something similar to it. Go to (URL) and click on "the real McCoy" on the left.... it is a facinating site, though he (...) (25 years ago, 29-Feb-00, to lugnet.robotics)
  SV: Questions about unoficial (?) use of electrical LEGO parts
 
I wouldn't advice you to connect the Cybermaster directly to the RCX, you should use an optocoupler or similar... Regards, Thomas -----Oprindelig meddelelse----- Fra: Marco C. [mailto:marco@soporcel.pt] Sendt: 29. februar 2000 18:56 Til: (...) (25 years ago, 29-Feb-00, to lugnet.robotics)
  Re: Questions about unoficial (?) use of electrical LEGO parts
 
(...) Hi Thomas :) hmmm... well, I always thought so, but thinking something along the lines of: "Well, LEGO's for Kids, and kids make mistakes (adults too, eheh), so wouldn't LEGO prepare the INPUT's to withstand a "mistake" of such a connection ?" (...) (25 years ago, 1-Mar-00, to lugnet.robotics)
  Re: Questions about unoficial (?) use of electrical LEGO parts
 
(...) Yes, Bert Van Dan's one of my "regular" LEGO-Robotics (and AI) site. It's a great site :) I've seen "the real McCoy" *project*, and it's something along the lines of what I thought of doing to connect a CyberMaster with other pBricks. I'm not (...) (25 years ago, 1-Mar-00, to lugnet.robotics)
  Cybermaster-RCX interface (was: Questions about unoficial (?) use of electrical LEGO parts)
 
(...) Well, that's my problem, I don't have any kind of measuring tool (er... nor the expertise ;) to check for myself if it's safe to try a direct connection between the OUTPUT-INPUT ports. Please, share your findings :) ! (...) Yes, I think it's (...) (25 years ago, 1-Mar-00, to lugnet.robotics)
  Re: Questions about unoficial (?) use of electrical LEGO parts
 
(...) Marco, I've had limited experience and success using the output of a master RCX to trigger the input of a slave RCX. The communication was quite reliable and there doesn't appear to be any damage to the slave unit, however there were some side (...) (25 years ago, 1-Mar-00, to lugnet.robotics)

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