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 | | Re: Sending ir packets
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| (...) Here ya go: Remember start bit (sometimes called 2 stop bit mode) 55 00 D1 ~D1...Dn ~Dn C ~C Add all the normal D parts in a single Byte for Chksum. Code chunk for example ... unsigned char MuxStr[] ={0x55,0xf7,0x08,0x0...xf8,0x07}; count = 7; (...) (23 years ago, 29-Sep-01, to lugnet.robotics.rcx)
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ir
(score: 0.411)
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| | Re: Sending ir packets
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| Check the source code for NQC (in rcx/RCX_Link.cpp), or even use it as your underlying comms library. You may spot something Dave does that you don't.. Phil. (...) (23 years ago, 29-Sep-01, to lugnet.robotics.rcx)
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ir
(score: 0.411)
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ir
(score: 0.409)
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| | Re: RCX sensor interfaces - diodes
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| I think the real point here is that it is usually necessary to incorporate a bridge network of six diodes to interface to the RCX sensor inputs. The signalling current must pass through at least two series diodes to get to the RCX terminals - a (...) (23 years ago, 28-Sep-01, to lugnet.robotics.rcx)
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range
(score: 0.408)
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| | Using two RCX bricks in one robot
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| I'm kicking around the idea of building a Mindstorm's based entry for the Trinity College Fire-Fighting Home Robot Contest (see (URL) ). I may be mistaken, but it seems impractical to attempt this task with a single brick... there just don't seem (...) (23 years ago, 18-Sep-01, to lugnet.robotics.rcx)
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ir
(score: 0.408)
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tower
(score: 0.408)
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| | Mass and other spec's for RCX components
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| Does anyone has measurements for the mass of Mindstorms components (in grams)? I am particularly interested in the mass of the RCX brick (with batteries), the gearmotors, and the motorcycle-style wheels/tires. I am having a remarkably hard time (...) (23 years ago, 27-Sep-01, to lugnet.robotics.rcx)
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range
(score: 0.408)
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| | Re: Opening COM port error
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| (...) Tyler, Happy to be of help! Regarding Garbage Collection, I'm not usually one to criticise without being able to suggest a better alternative. In this case, I think most GC systems could be improved by mimicking the concept of "smart pointers" (...) (21 years ago, 30-Nov-03, to lugnet.robotics.rcx.java, lugnet.off-topic.geek)
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long
(score: 0.408)
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| | Re: Robolab, byte codes and assembler
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| (...) Two problems: 1. From what I've read about the problem, the speed I ran it at was right in the "sweet spot". 2. BrickOS would not qualify for the competition. I wonder if (hope?) the recent unavailability of rotation sensors at Pitsco is (...) (21 years ago, 26-Nov-03, to lugnet.robotics.rcx.robolab, FTX)
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long
(score: 0.407)
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| | RCX IR protocol
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| Hi all, I was looking at the IR protocol described at (URL) and i dont quite understand. In paricular: What is the packet header? what does the ~ mean? (eg "RCX reply opcode is always ~query opcode") I am asking because i am writing an application (...) (23 years ago, 2-Sep-01, to lugnet.robotics.rcx)
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ir
(score: 0.407)
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| | Re: RCX IR protocol
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| Hi, Juergen has done a small mistake in his example. (...) Better it should be ~f7=~11110111=00001000=08. If you want to get a little bit of math you may add every number to its complement and you will always get ff for the result. If we take (...) (23 years ago, 4-Sep-01, to lugnet.robotics.rcx)
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ir
(score: 0.407)
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| | Re: RCX IR protocol
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| (...) Take a look at (URL) (...) 55 ff 00 (...) complement, i.e. invert every bit separately. So for example ~f7=~11110111=00001000=10. (...) Good luck and show it to us when you are done Jürgen (23 years ago, 4-Sep-01, to lugnet.robotics.rcx)
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ir
(score: 0.407)
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| | Re: RCX IR protocol
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| On the page (URL) look under the description of his send command and you'll see he sends a query "10" (hex) and gets a response "ef". This value, 0xEF, is the logical not (modulus 0xFF) of the query value 0x10. The tilde means "not". Dennis (...) (23 years ago, 3-Sep-01, to lugnet.robotics.rcx)
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ir
(score: 0.407)
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| | Re: Anyone know how to build a stall sensor?
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| (...) Yes. I found on article on using the battery voltage to determine the same thing, i.e. more current, less volts. To do it you need replacement firmware. I use leJOS (a Java VM), I'm one if the developers, so I could go in that way. I'm going (...) (23 years ago, 6-Sep-01, to lugnet.robotics.rcx)
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ir
(score: 0.406)
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| | Re: I'm passing the NQC torch...
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| (...) Your contribution to the Mindstorms community through NQC has been fantastic. When I started with Mindstorms, that was the only language I used for a long time. Thanks and the very best regards !! KK (21 years ago, 11-Nov-03, to lugnet.robotics.rcx.nqc)
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long
(score: 0.405)
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| | Re: I'm passing the NQC torch...
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| (...) Please allow me add my sincere thanks to Dave for all the hard work he has put in over the last few years. As far as I am concerned, RIS only really appeals to me because of the access that NQC has permitted to the RCX. Were we to have been (...) (21 years ago, 11-Nov-03, to lugnet.robotics.rcx.nqc)
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long
(score: 0.405)
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| | I'm passing the NQC torch...
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| NQC version 2.5r3 has been released: (URL) is my last release of NQC. John Hansen will be maintaining NQC in the future. John has done some great work with BricxCC, and has plenty of energy and good ideas for improvements to NQC. He is primarily a (...) (21 years ago, 11-Nov-03, to lugnet.robotics.rcx.nqc) !!
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long
(score: 0.405)
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ir
(score: 0.405)
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| | Re: Anyone know how to build a stall sensor?
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| (...) Yes. I just got a rotation sensor. Trouble is that the motors could stop for a variety of reasons (like the robot isn't moving). That isn't the real reason though (I could always handle that in software). The real reason is that ever since I (...) (23 years ago, 6-Sep-01, to lugnet.robotics.rcx)
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range
(score: 0.405)
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| | Re: to analog as rcx is to programming plastic
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| (...) Chris! I had the same kit as a kid! I've been trying to remember the name of it for a little while now. Every once in a while I search on eBay hoping it might show up in an auction... No luck so far. I remember the tray was made of metal and (...) (21 years ago, 5-Nov-03, to lugnet.robotics.rcx)
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long
(score: 0.404)
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