Subject:
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Re: rcx power circuit
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Newsgroups:
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lugnet.robotics
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Date:
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Fri, 7 Dec 2001 09:59:58 GMT
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Original-From:
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Steve Baker <sjbaker1@airmail#NoSpam#.net>
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Reply-To:
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SJBAKER1@AIRMAILantispam.NET
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Viewed:
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597 times
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Gareth Bestor wrote:
>
> In lugnet.robotics, uhr@mathias.net writes:
> > ...
> > - because of the rectifier circuit in the 1.0, the polarity
> > of the external power plug doesn't matter, you can
> > even attach an ac source (which i tested) and even
> > more than 12v (which i didn't test, don't sue me!).
> > i wouldn't recommend this though, cause the regulator
> > ic would then probably produce too much heat.
>
> FYI - I ran my RCX1.0 for a while with a 12V DC adapter. The RCX has "9-12V"
> printed above the plug. One day I thought I check my DC adapter and found it
> was actually putting out 18V!
Did you check it with a load (such as the RCX) on it? Some power supplies can
only regulate the voltage when there is some kind of load. If you just measure
the voltage with nothing except a meter on the end, it may well be insanely high
but it was probably putting out something only a little over 12v when the RCX
was connected.
> Needless to say I stopped using it, but I had
> been running the RCX for quite long periods of time at 18V with apparantly no
> permanent damage.
Whilst that *might* be true, it's more likely that you were actually running
it at 12v.
> I wouldn't recommend this of course, but the RCX does seem to
> have a high tolerance for abuse.
Yes - I'm always impressed by the way Lego engineer electrical/electronic
parts to survive abuse.
----------------------------- Steve Baker -------------------------------
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Message is in Reply To:
 | | Re: rcx power circuit
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| (...) FYI - I ran my RCX1.0 for a while with a 12V DC adapter. The RCX has "9-12V" printed above the plug. One day I thought I check my DC adapter and found it was actually putting out 18V! Needless to say I stopped using it, but I had been running (...) (23 years ago, 6-Dec-01, to lugnet.robotics)
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