 | | Re: the LEGO CNC-Machine
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wooooow you're the guy that built all those milling machines? and the lathe? first of all, respect! i loved the toast milling :D of course i checked out your site, it's pretty inspiring but i'm thinking of making some additions to the machine (...) (17 years ago, 28-Aug-07, to lugnet.robotics.rcx)
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| | Re: the LEGO CNC-Machine
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"daniel" <daniel.formatc.at.gmail.com> wrote in message news:JnHosE.AJ6@lugnet.com... (...) Looks like your plan will provide a complete package. You are welcome to any ideas on my site. This is a real challenge. Bob Fay (17 years ago, 28-Aug-07, to lugnet.robotics.rcx)
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| | the LEGO CNC-Machine
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hey! first post on lugnet, i hope it won't be the last! anyways, i just wanted to share my new creation with you, the LEGO CNC-MACHINE. to avoid confusions, this is not a finished project, i'm starting to build it and will keep posting updates on my (...) (17 years ago, 28-Aug-07, to lugnet.robotics.rcx)
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| | New RCX 2.0 version
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The photo posted by Patrick Bégin ((URL) a new version of the RCX 2.0 board, with several interesting characteristics... - The board was completely redesigned, here is the photo of the new version posted by Patrick: (URL) older version looked like (...) (17 years ago, 27-Aug-07, to lugnet.robotics.rcx)
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| | Re: I played with fire...
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(...) Hello Patrick, Your RCX2 version is completely new to me - That't very interesting... more on that later (btw, would you have a photo of the other side of the board?). The component you show as burnt is most probably a power diode, as (...) (17 years ago, 27-Aug-07, to lugnet.robotics.rcx)
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| | RE: I played with fire...
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(...) My mistake. The RCX 1.0 has an AC adaptor jack which has a full-wave bridge rectifier to convert to DC and would provide AC protection. I guess RCX 2.0, without the external jack, does not have this. (17 years ago, 26-Aug-07, to lugnet.robotics.rcx)
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| | Re: I played with fire...
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(...) I applied 9V AC power to the internal + - battery connectors. (17 years ago, 26-Aug-07, to lugnet.robotics.rcx)
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| | RE: I played with fire...
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(...) While your RCX is fried, it is probably not from plugging AC power into the power plug. LEGO's low voltage adaptor is an AC adaptor. Or did you mean you applied AC power to the RCX sensor port? (17 years ago, 26-Aug-07, to lugnet.robotics.rcx)
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| | Re: I played with fire...
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Hi Patrick, (...) that looks like a somewhat large diode to me. In my own picture it is round and is marked with a diode symbol and "A2". (...) It shouldn't he hard to replace. But I doubt that it is the only thing that is damaged. It looks like it (...) (17 years ago, 26-Aug-07, to lugnet.robotics.rcx)
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| | I played with fire...
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I applied 9V AC power to a RCX 2.0... yes yes, DC is required. Does anybody successfully repaired such a disaster ? Here are pictures pointing to what I think burned out. What is that component ? Anybody successfully replaced it ? (URL) have (...) (17 years ago, 24-Aug-07, to lugnet.robotics.rcx)
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| | Re: Sign of center pin on power adaptor
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(...) You must be dealing with a different release of the battery pack than I am, since the only portion of the US instructions that mentions numbers states the output of the battery pack (10VAC, 7VA) and the approximate charge time (4 hours). There (...) (17 years ago, 12-Jul-07, to lugnet.robotics.rcx)
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| | Re: problem with the RCX
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"Brian Davis" <brdavis@iusb.edu> wrote in message news:JL1oK5.K84@lugnet.com... (...) This might help! (URL) (...) (17 years ago, 12-Jul-07, to lugnet.robotics.rcx)
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| | Re: problem with the RCX
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(...) Is the RCX still working? Does it "get hot" when it's running an unloaded motor? I would have thought that the 500 mA limit within the RCX case would prevent this, but perhaps it's marginal for some plastic piece "nearby". If the RCX is dead, (...) (17 years ago, 12-Jul-07, to lugnet.robotics.rcx)
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| | problem with the RCX
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One of my students accidently left a tied up gear train running for a while, i.e. In the midst of running a RCX, the case not only gets very hot, but also has a very strong plastic burning smell. At first I thought it is due to the stuck gear train, (...) (17 years ago, 11-Jul-07, to lugnet.robotics.rcx)
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| | Re: Sign of center pin on power adaptor
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(...) I agree. (...) The spec on the train AC adapter exactly matches the spec in the Li-Ion battery pack instructions. Jürgen (17 years ago, 11-Jul-07, to lugnet.robotics.rcx)
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| | Re: Sign of center pin on power adaptor
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(...) Whoops, I missed that there was a third option. I concur with this, as it's both the right voltage and confirmed AC. The mA rating, BTW, is a capacity rating, so it will work for anything that draws 800mA or less. The NXT adapter is rated for (...) (17 years ago, 11-Jul-07, to lugnet.robotics.rcx)
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| | Re: Sign of center pin on power adaptor
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(...) All my train PSUs are 10V AC, but are rectified and regulated to a nice 9V internally. (17 years ago, 11-Jul-07, to lugnet.robotics.rcx)
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| | Re: Sign of center pin on power adaptor
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Usually AC will either say AC or have a ~ symbol. DC will either say DC or have a symbol that looks like = or _-_ -Rob A> (...) (17 years ago, 10-Jul-07, to lugnet.robotics.rcx)
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| | Re: Sign of center pin on power adaptor
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(...) The AT&T 9v AC 800mA supply sounds just about right. (17 years ago, 10-Jul-07, to lugnet.robotics.rcx)
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| | Re: Sign of center pin on power adaptor
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(...) _ALWAYS_ assume DC on an actual power adapter (at least in the US). Most AC devices will just use a simple cord, like you'd find on a portable stereo. A handful of devices will need AC power in a non-standard voltage and will use DC-like power (...) (17 years ago, 10-Jul-07, to lugnet.robotics.rcx)
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