Results 4981 – 5000 of 6562.
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 | | Re: Worth the wait? (Yup!!!)
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| (...) Really? You truly believe that there would have been scads of folks going into cardiac arrest over the announcement that a toy is being re-released? Come on - it's not like we're talking about beanie babies or Star Wars action figures. On the (...) (23 years ago, 8-Jun-01, to lugnet.castle)
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| | Re: My New Website
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| (...) No worries, it's back up now I am glad to say! I'm just off to have a look at the tower crane. I wouldn't worry overly about the pictures, it doesn't affect the enjoyment of the site or anything like that, I just get dead pedantic about such (...) (23 years ago, 7-Jun-01, to lugnet.technic)
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| | Re: Dead RCX
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| Completely dead? no response of any kind when you push the ON/OFF button? I ask because if battery power is off for too long, the firmware evaporates and the RCX is pretty non -responsive. But the LCD is not blank. If this is the case, download the (...) (23 years ago, 17-May-01, to lugnet.robotics.rcx)
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| | Re: Ahhhh...to be surrounded once more by Pirates...
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| (...) Much cooler. Unfortunately I got rid of most of the skeletons-- they paid for the Oasis Ambushes! :) (...) You know how much that's entered our cultural lexicon? I whispered, while watching "The Mummy Returns" last weekend, during the scene (...) (23 years ago, 7-Jun-01, to lugnet.pirates)
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| | Famous Pieniazeks I Have Encountered
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| Hi all, In the course of doing my dissertation research in the last year, I had pause to visit the Royal Geographical Society archives to look through the files of Sir Charles Arden-Close, who headed both the Geographical Section, General Staff and (...) (23 years ago, 6-Jun-01, to lugnet.people)
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| | Re: Auto Crossing
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| (...) The simplest way is to use a reed switch under the track to pick up the magnetic couplers. I haven't tried this method but it shouldn't give you any problems. Reed switches are a little hard to come by though (in my recent experience). The (...) (23 years ago, 6-Jun-01, to lugnet.trains)
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| | Re: Monorails
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| (...) Why shouldn't it be possible? Actually I only know the spirals of Jan, a friend of mine, who built them for 12V track. But they are far to big, to get them on most tables. With an increase of one brick per 16 studs of track, all the 12V (...) (25 years ago, 9-Feb-00, to lugnet.trains)
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beneke
(score: 0.291)
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| | Re: Custom Firmware, IR Problems, and Dead RCXs (long)
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| Another way of working around the high power and range problems would be an IR repeater. Usually these are used to extend the range of IR remote controls to another room or to a stage. (URL) two-way device might be needed here -- I've also seen some (...) (23 years ago, 30-May-01, to lugnet.robotics)
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| | Re: Custom Firmware, IR Problems, and Dead RCXs (long)
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| In lugnet.robotics, Matthias Jetleb writes: <snip...> (...) One important point that I haven't seen mentioned here is that the RCX AC adaptor input is labelled "9-12V~", which is AC, not DC. I have used the transformer that comes with the 9V train (...) (23 years ago, 30-May-01, to lugnet.robotics)
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| | Re: Custom Firmware, IR Problems, and Dead RCXs
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| (...) Gee, could you tell I don't have a block diagram of the innards of the RCX? 95% of the work I've done with microcontrollers has been based on the MC68HC705J1A, J2A and K1 series (mainly because that's what I have the development tools for). (...) (23 years ago, 30-May-01, to lugnet.robotics)
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| | Re: Custom Firmware, IR Problems, and Dead RCXs (long)
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| (...) Oops. I just assumed that the RMS vs Peak value of an AC transformer and the subsequent consequences for the tower were so obvious that anyone with an electronics background would have pointed it out, and since you didn't, I figured you must (...) (23 years ago, 30-May-01, to lugnet.robotics)
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| | RE: Custom Firmware, IR Problems, and Dead RCXs
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| (...) Ummm, that doesn't make sense. You know where the midpoint is by knowing the baud rate, and hence the bit width. The only time you need to sample at the beginning of the bit time is to look for a start bit. This is all very basic asynchronous (...) (23 years ago, 29-May-01, to lugnet.robotics)
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| | Re: Favorite Lego Train?
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| (...) Before getting more requests about the thing above: I was talking of the best Lego-Train-Year 1983. And at that time the 7750 was still in the shelfes..... Regards Ben (25 years ago, 7-Feb-00, to lugnet.trains)
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beneke
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| | RE: Custom Firmware, IR Problems, and Dead RCXs
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| (...) <snip> (...) <snipped more> Well, no. The RCX receiver is a standard IR unit tuned to the carrier frequency. when I look a the signal on my scope, I get a nice square-shaped wave that is the same as the data byte (with start and stop bits) (...) (23 years ago, 29-May-01, to lugnet.robotics)
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| | RE: Custom Firmware, IR Problems, and Dead RCXs (long)
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| (...) The use of alternative firmware such as pbForth, legOS and leJOS usually requires frequent upload/download cycles, and may use long communications periods. (...) I agree on this point, but that will affect the low power range more as well. (...) (23 years ago, 29-May-01, to lugnet.robotics)
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| | Re: Favorite Lego Train?
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| Seems to me, as if we people in good old Europe have a little different view on trains (exept from James Mathis of course). Like Arjen, most of my frieds like the trains from the early 80ies most. I'm of the opinion 1983 was the greatest year for (...) (25 years ago, 7-Feb-00, to lugnet.trains)
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beneke
(score: 0.291)
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| | RE: Custom Firmware, IR Problems, and Dead RCXs
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| Ralph, Thank you for painting a much clearer picture of the internal design of the IR Tower. I agree with your observations, but have a question: Is the processor in the IR Tower controllable (i.e. downloadable, like the RCX)? If it is, then there's (...) (23 years ago, 28-May-01, to lugnet.robotics)
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| | Re: Custom Firmware, IR Problems, and Dead RCXs (long)
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| (...) For what it's worth, it's not actually that bad. I don't know the specs on the NPN transistor, but I suspect 1.14A would kill it almost instantaneously. One important factor you've left out of this equation is the 9V battery itself. We often (...) (23 years ago, 29-May-01, to lugnet.robotics)
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dead
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| | Re: Custom Firmware, IR Problems, and Dead RCXs
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| (...) Actually, it's the computer itself that determines the duty cycle. This does mean that you could change the duty cycle, but you should be aware that it would be at the expense of noise immunity and would require a higher sampling rate from the (...) (23 years ago, 29-May-01, to lugnet.robotics)
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| | Re: Custom Firmware, IR Problems, and Dead RCXs (long)
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| I'm hard pressed to understand why one would need to continually transmit from either the RCX or the tower? Data logging comes to mind, but there aren't many cases where there is a need for this. Listening can, of course, be done continously. The (...) (23 years ago, 29-May-01, to lugnet.robotics)
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