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 | | Re: Minitalia Lego
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| (...) are dead ringers for these, that I'm curious if they actually are. The studs are solid and have no logo on them. There is a very noticeable mold seam which crosses the studs along the length of the window. The fingers on the bottom do look (...) (23 years ago, 19-May-01, to lugnet.general)
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| | Custom Firmware, IR Problems, and Dead RCXs (long)
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| The following information is my own opinion and not endorsed or verified in any way by LEGO. That being said, I think that now is the time to relate some experiences I've had over the past couple of months with my RCX and IR tower - and it boils (...) (23 years ago, 27-May-01, to lugnet.robotics)
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| | Joe's LEGO Page rediscovered - Like to contact him...
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| Hi all, nearly a year ago I discovered LEGO® Fan pages on the internet! One which was burned into my mind was "Joe's LEGO Page" at: (URL) the link was dead for a while and now I have rediscovered these sides with brilliant MOC! I really like to (...) (23 years ago, 15-May-01, to lugnet.people)
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| | Re: lnpd
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| Ah. Those links. I have asked Markus to move those a couple of times but he no longer responds to my emails. I'm afraid that until he does those links will remain in place (and remain quite dead.) Sorry... Luis (...) ---...--- "Nobody ever said that (...) (23 years ago, 16-May-01, to lugnet.robotics.rcx.legos)
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| | RE: Custom Firmware, IR Problems, and Dead RCXs (long)
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| (...) You are right, but the RCX and the tower are right at the hairy edge. The additional 50R impedance will leave the near mode essentially unchanged and I'll sacrifice on the high range. Start with the tower. If you use a 9V battery, the IR (...) (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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| Oh, geez, this could be bad. Could changing the firmware to reduce comm activity fix this? It seems to be a problem of usage, not specific firmware properties (i.e. constant data uplaoding.) Andy (...) -- See my Visual Interface for leJOS at (URL) (23 years ago, 27-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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| | 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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| | 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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| (...) 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: 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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| (...) 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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