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 Robotics / RCX / *670 (-20)
  Re: RCX Currnet Rating?
 
You mean you use the red motor/switch combination as a sort of 'electronic' fuse? Oh, right. While I'm typing I suddenly see what you mean. You use an external power supply for the motors. Clever. Isn't the switching a little slow using the (...) (25 years ago, 5-Sep-99, to lugnet.robotics.rcx)
 
  Re: RCX Currnet Rating?
 
The best way to avoid high current running thru the brick is to control a small red motor which drives one of the polarity switches which is hooked up to a battery pack and that in turn runs the main motors. We had this problem at the LEGO (...) (25 years ago, 5-Sep-99, to lugnet.robotics.rcx)
 
  Re: RCX Currnet Rating?
 
MJ, The RCX itself does not need a lot of power. However, if you're going to run 2 motors off each output port (a total of 6), 200 mA won't be enough. I expect the motors to draw at least 100 mA each. Even more when stalled. Maximum power to be (...) (25 years ago, 5-Sep-99, to lugnet.robotics.rcx)
 
  Re: decoding a message sent by an RCX
 
(...) I second that! I tried using the "native" language and its limitations baffled me. I never got a program downloaded. I jumped straight to NQC and have done several now. Good work Dave! DLC (25 years ago, 5-Sep-99, to lugnet.robotics.rcx.nqc)
 
  Re: decoding a message sent by an RCX
 
Dave Baum wrote: [snip] (...) Better yet, make it generate the code that I want it to generate, not what I tell it to generate. Thanks for giving us all such a great language ... without NQC I most likely would have an RCX collecting dust. - Nick - (25 years ago, 5-Sep-99, to lugnet.robotics.rcx.nqc)
 
  Re: decoding a message sent by an RCX
 
(...) I wondered about that - hardly any traffic in the newsgroup despite numerous downloads of NQC. I hope its because people are just too busy building stuff and programming it with NQC and RcxCC. Perhaps I should add a few more bugs to NQC just (...) (25 years ago, 5-Sep-99, to lugnet.robotics.rcx.nqc)
 
  Re: RCX Currnet Rating?
 
(...) I'd bet you are safe with a 200 mA adapter. I have been using a 120 mA adapter for a while now with no problems. -Kekoa (25 years ago, 5-Sep-99, to lugnet.robotics.rcx)
 
  RCX Currnet Rating?
 
Hi, I have a 9V adapter that will fit the RCX. It has a current rating of 200mA. What is the current rating for ther RCX? I have seen adapters that are rated from 100mA up to 800mA. Thx...MJ (25 years ago, 4-Sep-99, to lugnet.robotics.rcx)
 
  Re: decoding a message sent by an RCX
 
(...) [...] I think something like this was already made by LEGO itself in the lab while creating the RCX/CyberMaster software. I say this because they seem to have forgot to remove the CABLE mode of transmission from the Spirit.ocx when deploying (...) (25 years ago, 4-Sep-99, to lugnet.robotics.rcx.nqc)
 
  Re: decoding a message sent by an RCX
 
Woaw ! This could be great to have a full featured rcx expansion board... It should however be not too expensive, and in my opinion very basic to allow anything to be made. A "simple" (hehe :-) 8 bit Input / Output expander would be very, very nice. (...) (25 years ago, 4-Sep-99, to lugnet.robotics.rcx.nqc)
 
  RE: decoding a message sent by an RCX
 
Dave wrote... (...) Remember, you can send arbitrary ASCII data using pbFORTH. For example, to send "Hello World" you just use... : HELLO ." Hello World" CR ; Or to identify your RCX, you could use something like... : WHOAMI ." I am RCX number " (...) (25 years ago, 4-Sep-99, to lugnet.robotics.rcx.nqc)
 
  Re: decoding a message sent by an RCX
 
(...) Yes, you are correct - 11 bits total per byte. And yes, this is very non-standard. I believe the signal is inverted - meaning that IR light is present for "0" bits, and no light for "1" bits. But I'm going from memory here and haven't looked (...) (25 years ago, 4-Sep-99, to lugnet.robotics.rcx.nqc)
 
  decoding a message sent by an RCX
 
hiya, I have been working on an idea to extend the number and type of devices that the RCX can control. I started with the idea of encoding serial data on one of the motor lines and decoding that in a PIC to do <stuff>. However, because working at (...) (25 years ago, 3-Sep-99, to lugnet.robotics.rcx.nqc)
 
  Re: Handy Board software
 
take a look at Ray's Robotic Computer. i have a url somewhere. This dude makes a 68HC11 mini board in modules from his basement. Completely assembled and tested versions too. I found him through altavista a couple of times +breiler (...) (25 years ago, 2-Sep-99, to lugnet.robotics, lugnet.robotics.rcx.legos)
 
  HOWTO- temporary URL
 
Hey! I finally have the HOWTO back up at a temporary URL- (URL) old URL may be back up as soon as this evening or afternoon, but in the meantime, please point your browsers here. Thanks for putting up with me- Luis P.S. I hope to make several (...) (25 years ago, 31-Aug-99, to lugnet.robotics.rcx.legos)
 
  Re: Unable to unzip (or bunzip2) legOS-990330.tar.bz2
 
I didn't even try, since the other things on the site didn't work. I got it from the site of Luis's howto.I wonder if the site will ever be fixed Frederick N. Brier wrote in message <37C3B4DC.B27D3028@m...ck.com>... (...) (25 years ago, 26-Aug-99, to lugnet.robotics.rcx.legos)
 
  new release???
 
Hi, I've been wondering why there hasn't been put out a newer release than 990330, especially since the rotation sensors doesn't work in it. But the error was identified way back in April by Mario Ferrari ((URL) STATE_0_VALUE (ds_unscale(1023U)) ... (...) (25 years ago, 26-Aug-99, to lugnet.robotics.rcx.legos)
 
  Re: RCX Battery Source
 
my rcx works fine with a universal ac to dc wall outlet. it has a switch to change the voltage. i've got it set at 9v and it operates at 800mA max. i figured 6 batteries x 1.5v =9v. i think it was originally for a keyboard (musical instrument, not (...) (25 years ago, 25-Aug-99, to lugnet.robotics.rcx)
 
  HOWTO news :(
 
I just got back from vacation 2-3 hrs ago, and have just found out that the school cleared our one-year name leases while I was gone. As a result, the HOWTO at arthurdent.dorm.duke.edu has been unavailable for several days (not quite sure how long (...) (25 years ago, 25-Aug-99, to lugnet.robotics.rcx.legos)
 
  RCX Battery Source
 
Hi All, My old cellular "bag-phone" died a while back and I replaced it with a nice teeny tiny PCS phone. I had bought the 12V 2.3Ah sealed lead battery as an option with the original phone. It is WAY smaller than the 4Ah monsters I'm using for (...) (25 years ago, 25-Aug-99, to lugnet.robotics.rcx)


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