 | | RE: The pain of communicating with the RCX
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(...) Good. I'm glad your on-side so far :-) (...) You are right. I have found that getting a reliable connection is very dependent on ambient light, the voltage of the RCX batteries, and the tower itself. Try to use the tower in NEAR mode so that (...) (25 years ago, 9-Mar-00, to lugnet.robotics.rcx.pbforth)
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| | The pain of communicating with the RCX
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The power of Forth lies in the ease with which a system can be built and and tested both incrementally and interactively. Unfortunately I'm experiencing severe difficulties estasblishing a reliable communication channel between my PC (Linux) and the (...) (25 years ago, 9-Mar-00, to lugnet.robotics.rcx.pbforth)
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| | RE: Drive R/C Servos with the RCX and pbForth (long)
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<snipped discussion of the math of selling servo controller boards> (...) I'm not too worried about them stealing the idea. I can't imagine that none of their designers have thought about driving servos with the RCX. The circuit itself is so simple (...) (25 years ago, 13-Feb-00, to lugnet.robotics, lugnet.robotics.rcx.pbforth, lugnet.robotics.rcx)
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| | Re: Drive R/C Servos with the RCX and pbForth (long)
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In lugnet.robotics, Ralph Hempel writes: <snip> (...) What they will do and what they can do are two separate questions. Basically they can do nothing about the sales. They can complain about not respecting their trademark, or of copying of their (...) (25 years ago, 13-Feb-00, to lugnet.robotics, lugnet.robotics.rcx.pbforth, lugnet.robotics.rcx)
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| | RE: Drive R/C Servos with the RCX and pbForth (long)
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(...) Oops, forgot to answer the main question. Yes, I have thought about making boards...and as soon as I get out from under my current workload I'm going to give it even more thought.... It is just not worth my time and money to make any less than (...) (25 years ago, 12-Feb-00, to lugnet.robotics, lugnet.robotics.rcx.pbforth, lugnet.robotics.rcx)
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| | RE: Drive R/C Servos with the RCX and pbForth (long)
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(...) I hear you, John. Learning a new language can be a bit tricky, and I won't go into the details of why I think it's a good idea to learn different languages to get the benefit of different ways of thinking about problems...oops, don't get me (...) (25 years ago, 12-Feb-00, to lugnet.robotics, lugnet.robotics.rcx.pbforth, lugnet.robotics.rcx)
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| | Re: Drive R/C Servos with the RCX and pbForth (long)
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Ralph - I'm interested in the use of servos with the RCX, but I have no interest in learning the quirks of another computer language. I'm already a bit familiar with Visual Basic,and control the RCX with it. Can your pbForth solution be duplicated (...) (25 years ago, 12-Feb-00, to lugnet.robotics, lugnet.robotics.rcx.pbforth, lugnet.robotics.rcx)
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| | RE: Drive R/C Servos with the RCX and pbForth (long)
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(...) I should add here that no external power source is necessary to drive the servo. This is important since a micro or miniservo and an SMT version of the driver can be made to fit INSIDE a space similar to a worm gear box (6588 in LDraw). I'm (...) (25 years ago, 12-Feb-00, to lugnet.robotics, lugnet.robotics.rcx.pbforth, lugnet.robotics.rcx)
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| | RE: Drive R/C Servos with the RCX and pbForth (long)
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(...) No, the servo needs power to the + and ground terminals to drive the motor to the setpoint indicated by the signal wire. If I don't invert the signal there is no power for about 30msec and only 1 or 2 msec ov voltage on the motor port. By (...) (25 years ago, 12-Feb-00, to lugnet.robotics, lugnet.robotics.rcx.pbforth, lugnet.robotics.rcx)
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| | Re: Drive R/C Servos with the RCX and pbForth (long)
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(...) If you're using a custom motor driver in pbForth, why use the inverter circuit at all? Why not just generate the desired waveform directly? Is there not enough current to drive the servo that way? --Ben (25 years ago, 12-Feb-00, to lugnet.robotics, lugnet.robotics.rcx.pbforth, lugnet.robotics.rcx)
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| | Drive R/C Servos with the RCX and pbForth (long)
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Hi again everyone! A few days ago I announced that I had developed a nice little circuit using easily available parts that would let you connect servos to the RCX - with no external batteries or microprocessors or anything! At that time, I said that (...) (25 years ago, 12-Feb-00, to lugnet.robotics, lugnet.robotics.rcx.pbforth, lugnet.robotics.rcx)
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| | Re: Using Servos with the RCX - Yes!
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(...) YES! Great job Ralph! (...) I love this. I could drive up to 6 pneumatic cylinders with a single RCX... wow! (...) The circuit is very simple to set up even for a non-electronic guy like myself. Give me just the time to lay my hands on one of (...) (25 years ago, 10-Feb-00, to lugnet.robotics, lugnet.robotics.rcx.pbforth)
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| | Using Servos with the RCX - Yes!
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Hi all, I've finally got my RCX servo driver circuit working. It was actually working months ago but I couldn't get the servo to stop jittering. Then I swapped in a different servo, and it worked like a champ! (URL) Before you get all excited, the (...) (25 years ago, 10-Feb-00, to lugnet.robotics, lugnet.robotics.rcx.pbforth)
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| | Re: pbFORTH needs better uploading, docs
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(...) Getting a working legOS development evironment no longer takes a day. On Windows plateforms it only takes the time to download WinlegOS.exe (5.6Meg) and running the installer (a few minutes). The system is completely configured and ready to (...) (25 years ago, 2-Feb-00, to lugnet.robotics.rcx.pbforth)
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| | RE: installation problem!
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(...) Ummmm, I think if you use NQC command line, the counter only goes to 1300 or so. I wonder 1f RCXCC is reading the SRECORD file and padding it to 16384 bytes. I wonder if it is actually loading the old firmware. I wonder.... Cheers, Ralph (...) (25 years ago, 29-Jan-00, to lugnet.robotics.rcx.pbforth)
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| | Re: installation problem!
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(...) Yep - I did, same deal. Three times in a row, pbforth.srec uploaded fine all the way until the display read 1638 (which I presume is the end of the file) and then it cut out. I was a bit perplexed, so I re-uploaded firm0309.lgo, which worked. (...) (25 years ago, 29-Jan-00, to lugnet.robotics.rcx.pbforth)
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| | FW: installation problem!
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-----Original Message----- From: George Lampke [mailto:glampke@verinet.com] Sent: Thursday, January 27, 2000 12:50 PM To: Ralph Hempel Subject: Re: installation problem! You are right Ralph. Using the command line version of NCQ works to load (...) (25 years ago, 27-Jan-00, to lugnet.robotics.rcx.pbforth)
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| | RE: installation problem!
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(...) I've only verified pbForth being uploaded using the commandline version of NQC. (...) This is good. Has anyone else out there tried RCXCC to upload the pbForth firmware???? Cheers, Ralph Hempel - P.Eng ---...--- Check out pbFORTH for LEGO (...) (25 years ago, 27-Jan-00, to lugnet.robotics.rcx.pbforth)
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| | installation problem!
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Running Windows98. All works well with original RCX firmware and NCQ programs. Was anxious to try out pbFORTH as an alternative!! Unzipped pbforth111.zip and used RCX Command Center to download pbForth.srec. Progress window looked good UNTIL the (...) (25 years ago, 27-Jan-00, to lugnet.robotics.rcx.pbforth)
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| | RE: pbFORTH needs better uploading, docs
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David Chen wrote... (...) <snip> (...) Hallelujah! Another convert to the dark side.... (...) David, (and others) thanks for the support over the past year in my efforts with pbForth. It is really fun bringing a little language back to the (...) (25 years ago, 20-Jan-00, to lugnet.robotics.rcx.pbforth)
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