 | | Re: RCX 'brick connectors' and how-they-work??
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On the subject of making connector blocks, I have been very successful with taking the conductor strips you get as a S@H service pack, hacking two squares out, slotting one edge of each of the 2x2s, soldering wires to that side, slotting the inside (...) (25 years ago, 14-Sep-99, to lugnet.robotics, lugnet.robotics.rcx, lugnet.robotics.rcx.legos)
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| | Re: RCX 'brick connectors' and how-they-work??
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Thanks, Jonathan && Others... I'll look at the patent. With all the 'clones' out there, is it likely that Lego would complain if someone made compatible-but-not- identical connectors?? How do they handle the Clone Market?? Couple of questions, (...) (25 years ago, 14-Sep-99, to lugnet.robotics, lugnet.robotics.rcx, lugnet.robotics.rcx.legos)
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| | NQC 2 Request
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Hi, I just wondered whether it might be handy to add OnFwdFor(motors) and OnRevFor(motors). Regards Dave (25 years ago, 14-Sep-99, to lugnet.robotics.rcx.nqc)
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| | RCX as a universal remote?
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Here's a thought: You're in the bedroom with your trusty RCX on the floor. You're watching TV, but the tuner is in another room. You point your remote at your RCX, change channels, and the RCX scurries out of the room, off to repeat the IR command (...) (25 years ago, 13-Sep-99, to lugnet.robotics.rcx)
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| | Re: RCX Currnet Rating?: And info on Internals??
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Kekoa, Many Thanks for your tireless digging. I have seen a lot of very interesting stuff you have unearthed. I think that more is often learned about Engineering by 'Reverse Engineering' than 'forward'! Years ago I used to get tons of old IBM (...) (25 years ago, 12-Sep-99, to lugnet.robotics.rcx)
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| | Re: RCX Currnet Rating?: And info on Internals??
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(...) It is commonly believed that the RCX contains a full rectifier, so if you supplied AC, that would work, but more importantly, if you supplied either polarity of DC, that would work also. The conversion to AC also requires a sufficiently large (...) (25 years ago, 12-Sep-99, to lugnet.robotics.rcx)
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| | Re: RCX Currnet Rating?: And info on Internals??
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I'm still not clear on exactly what the RCX enternal-power input will accept. Can anyone tell us what the internals really are?? If I view the RCX power connector closely, I read: 9-12V~ (nine dash one two Vee tilde) I would interpret that to mean: (...) (25 years ago, 12-Sep-99, to lugnet.robotics.rcx)
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| | Solved?? rotation sensor problem.
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I tried solutions posted on this newsgroup to fix the rotation sensor problem.But It didn't work stable enough. I tracked the sensor input and realized the sensor sometimes picked up transient signal between two states. To solve this problem, I (...) (25 years ago, 10-Sep-99, to lugnet.robotics.rcx.legos)
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| | Re: RcxCC downloads
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I wrote first something like "It seems that this NQC newsgroup is not very active, but that's probably because NQC is 99.999% bug free and so is RCXCC...". So i was definitely not asking more traffic or so, simply looking at what has already been (...) (25 years ago, 9-Sep-99, to lugnet.robotics.rcx.nqc)
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| | Re: RcxCC downloads
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(...) I want to second that. I missed the NQC online help in version 3 also. It's nice to have a quick reference guide handy. Joel Shafer joel@connect.net (25 years ago, 8-Sep-99, to lugnet.robotics.rcx.nqc)
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| | Re: RcxCC downloads
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(...) Your version 3 is also great! When NQC 2 is released will the NQC help be put back in? I thought it was real handy addition on those long nights. --- DonC donc@cccd.edu (25 years ago, 8-Sep-99, to lugnet.robotics.rcx.nqc)
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| | RE: Help with connecting pyroelectric sensor
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(...) I read the sheet as saying the MINIMUM load is 125K, and the block diagram indicates a buffered output. It would be a good idea to buffer the output, but may not be strictly necessary. The bit about the reference being 20uA capable is correct, (...) (25 years ago, 8-Sep-99, to lugnet.robotics.rcx)
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| | RE: Help with connecting pyroelectric sensor
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Here's the link to the pyro sensor (URL) The schematic indicates that the reference moves relative to the output... I think the reference and output terminals are mislabelled. Given that they are mislabelled... The reference output has a 20uA max (...) (25 years ago, 7-Sep-99, to lugnet.robotics.rcx)
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| | RcxCC downloads
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Just because people want some more traffic in this newsgroup and to quantify the statement of Dave Baum, RcxCC version 2.3 was downloaded close to 3000 times from my web site up to now. Mark Overmars (...) (25 years ago, 6-Sep-99, to lugnet.robotics.rcx.nqc)
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| | Re: RCX Currnet Rating?
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Yes it is slow, if you count 1/2 a second slow, but not horrible. The big problem comes with control. Finding neutral again. NQC to the rescue. I find its better for this application than the RIS software. More open for creating servo control loops. (...) (25 years ago, 6-Sep-99, to lugnet.robotics.rcx)
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| | Re: RCX Currnet Rating?
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You mean you use the red motor/switch combination as a sort of 'electronic' fuse? Oh, right. While I'm typing I suddenly see what you mean. You use an external power supply for the motors. Clever. Isn't the switching a little slow using the (...) (25 years ago, 5-Sep-99, to lugnet.robotics.rcx)
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| | Re: RCX Currnet Rating?
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The best way to avoid high current running thru the brick is to control a small red motor which drives one of the polarity switches which is hooked up to a battery pack and that in turn runs the main motors. We had this problem at the LEGO (...) (25 years ago, 5-Sep-99, to lugnet.robotics.rcx)
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| | Re: RCX Currnet Rating?
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MJ, The RCX itself does not need a lot of power. However, if you're going to run 2 motors off each output port (a total of 6), 200 mA won't be enough. I expect the motors to draw at least 100 mA each. Even more when stalled. Maximum power to be (...) (25 years ago, 5-Sep-99, to lugnet.robotics.rcx)
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| | Re: decoding a message sent by an RCX
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(...) I second that! I tried using the "native" language and its limitations baffled me. I never got a program downloaded. I jumped straight to NQC and have done several now. Good work Dave! DLC (25 years ago, 5-Sep-99, to lugnet.robotics.rcx.nqc)
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| | Re: decoding a message sent by an RCX
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Dave Baum wrote: [snip] (...) Better yet, make it generate the code that I want it to generate, not what I tell it to generate. Thanks for giving us all such a great language ... without NQC I most likely would have an RCX collecting dust. - Nick - (25 years ago, 5-Sep-99, to lugnet.robotics.rcx.nqc)
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