 | | Re: Robolab, byte codes and assembler
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(...) Don't run it too quickly or too slowly. (URL) Um, that's all I know, besides using BrickOS which has code to make it more accurate. You mentioned that already. Actually, now that I think about it, BrickOS might be able to run assembly language (...) (21 years ago, 26-Nov-03, to lugnet.robotics.rcx.robolab, FTX)
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| | Robolab, byte codes and assembler
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Having investigated rotations sensors thoroughly, I conclude they have some serious design flaws. Most notably, some samples taken during voltage transitions can be impossible to differentiate from samples at entirely different rotational positions. (...) (21 years ago, 26-Nov-03, to lugnet.robotics.rcx.robolab)
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| | Re: multiple motors
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(...) So, how well did it work? How did the robot do? (21 years ago, 26-Nov-03, to lugnet.robotics.rcx)
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| | Re: multiple motors
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(...) (URL) such a mechanism I built in my latest sumobot... (sorry, bad photograph) Two gear shifts are activated at the same time, one for right wheels, the other for left wheels. The gearshift is activated by a motor controlled by RCX, gearing (...) (21 years ago, 26-Nov-03, to lugnet.robotics.rcx)
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| | Re: multiple motors
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(...) Yes, thank you - you explained it very well. The day after posting the question, I realized a differential would solve the problem... but you stated the solution far more clearly than I had thought of it. Now, of course, I'm trying to think (...) (21 years ago, 26-Nov-03, to lugnet.robotics.rcx)
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| | Re: failure in communicaton between RCX & IR Tower
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"Elizabeth Mabrey" <emabrey@storming-robots.com> wrote in message news:HoMq73.B9J@lugnet.com... (...) I (...) ceased (...) I (...) OK, I have the problem fixed. You may not like the remedy, but it worked lastnight flawlessly. Oh, and the PCMCIA USB (...) (21 years ago, 26-Nov-03, to lugnet.robotics.rcx.robolab)
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| | Re: multiple motors
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(...) Yes, that was the problem Brian was having. And, because the LEGO motors are so efficent, they work really well as generators. So, if you hook two together, and try to turn 1 and stop the other, you will have problems. I'm not sure I explained (...) (21 years ago, 25-Nov-03, to lugnet.robotics.rcx)
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| | Re: Weird downloading error
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Just some general ideas. If you're not using the firmdl or lejosfirmdl that came with lejos, try using one of those. Some versions of some downloaders have trouble with the lejos firmware. If you haven't tried fresh batteries in your RCX, try that. (...) (21 years ago, 25-Nov-03, to lugnet.robotics.rcx.java)
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| | Re: multiple motors
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(...) I'm just thinking out loud here, but it seems that the problem with the two middle motors is that they are wired together. So even if the RCX is told to float the motor output, both motors will want to turn together. If one turns, it will act (...) (21 years ago, 25-Nov-03, to lugnet.robotics.rcx)
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| | Re: multiple motors
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(...) Well, I've never actually tried running six motors directly from the RCX. However, I have used three motors to drive a sumo robot. And I've also used four motors (two on each side) to drive six wheels (two on the right, two on the left, and (...) (21 years ago, 25-Nov-03, to lugnet.robotics.rcx)
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| | Weird downloading error
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Hello ppl, I have this weird problem where I can't seem to download the lejos firmware completely onto the RCX. The counter on the RCX lcd counts up to 20 as the firmware is downloaded while the LCD also shows a weird 'V' sorta symbol on the far (...) (21 years ago, 25-Nov-03, to lugnet.robotics.rcx.java)
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| | Re: multiple motors
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(...) ...I love understatment. sigh... (...) OK, in trying to implement this I've come to an interesting impasse. Calculations suggest that for a 4 lb sumobot with reasonable tires would "benefit" from six motors, three on each side (differential (...) (21 years ago, 25-Nov-03, to lugnet.robotics.rcx)
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| | Re: Trains, DCC, and pbForth
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In lugnet.trains, David Koudys wrote: <snip> (...) <snip> This weekend was exceptionally busy, but I had time to play with the layout. Took my laptop downstairs, set it up with the IR tower, and loaded up Full Throttle. Wow! Pretty nifty piece of (...) (21 years ago, 24-Nov-03, to lugnet.trains, lugnet.robotics.rcx.pbforth, FTX)
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| | ERIKA 1.2 available for download...
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ERIKA 1.2 available for download! This version includes: - enhanced infrared support (single and multi-byte send!) - infrared transmission bugfix - PWM support now can be installed on timers T80/T81 depending on thefeatures (notes, IR transmission) (...) (21 years ago, 24-Nov-03, to lugnet.robotics.rcx)
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| | RE: Trains, DCC, and pbForth
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(...) DOH! Of course. In the fire alarm business, we have a three state voltage out to the sensors. Usually the Vout is 24V and the device can respond when the voltage falls to 5 V. The devices have a power supply that is basically a big cap and a (...) (21 years ago, 21-Nov-03, to lugnet.trains, lugnet.robotics.rcx.pbforth)
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| | Re: Trains, DCC, and pbForth
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(...) From what I've read, most DCC layouts have a separate small programming track anyways. This way a loco can be safely programmed without having to remove all the other locos from the layout[1]. So, you could hook output A of the RCX to the (...) (21 years ago, 21-Nov-03, to lugnet.trains, lugnet.robotics.rcx.pbforth)
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| | Re: Trains, DCC, and pbForth
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(...) Yes, sounds like fun! And, that DZ123 I recently posted about would be ideal for the job. I think I'll have to order one or two more to test this out. One change to LDCC that would help facilitate this would be the ability to configure LDCC to (...) (21 years ago, 21-Nov-03, to lugnet.trains, lugnet.robotics.rcx.pbforth, FTX)
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| | Re: Trains, DCC, and pbForth
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(...) So if I understand this correctly, my idea of inserting some kind of optoisolator or other power driver between the RCX and the track would interfere with LDCC receiving the ACK signal. Or could the sensor 1 input still be (safely) connected (...) (21 years ago, 21-Nov-03, to lugnet.trains, lugnet.robotics.rcx.pbforth)
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| | Re: Trains, DCC, and pbForth
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(...) The basic DCC ack is defined as an increase of load on the track of at least 60ma for 6ms +/- 1ms. Normally this happens on a quiet track where all you have powered is the decoder being programmed at the time. However, if you have a bunch or (...) (21 years ago, 21-Nov-03, to lugnet.trains, lugnet.robotics.rcx.pbforth)
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| | Re: Trains, DCC, and pbForth
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(...) Cool. I think that this is the key to getting DCC into wider use. After all, there are only so many trains that will fit onto a layout unless it is truly massive. But there are a lot of potentially motorized items on a layout that could be (...) (21 years ago, 21-Nov-03, to lugnet.trains, lugnet.robotics.rcx.pbforth, FTX)
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