Subject:
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Re: AC Adapter Specs?
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Newsgroups:
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lugnet.robotics
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Date:
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Sun, 24 Jan 1999 22:07:36 GMT
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Viewed:
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977 times
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On Sun, 24 Jan 1999 17:35:11 GMT, lego-robotics@crynwr.com (Peter
Thorup) wrote:
> I have looked on the RCX and I've noticed it does say "9-12V ~". From
> what I've gathered the "~" means polarity doesn't matter. My concern is
> the mA rating of 9 volt adapters. Radio Shack has about 6 different
> types each with a unique mA rating. (eg. 300 mA, 500 mA, 800 mA, etc.)
> My question is, could the wrong mA rating damage an RCX?
No. If you take one with too small a current rating, however, you
could overload the Power Supply and fry that. Or, maybe, you'll find
that oyur batteries still drain even with the RCX plugged in :)
I would think 800 mAmps should be enough, but you can never have too
large a current-rating.
Jasper
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Message has 1 Reply:
 | | Re: AC Adapter Specs?
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| I believe that you should, indeed, be wary of oversizing an AC adapter. The simple "wall cube" is unregulated and typically employs a "just-big- enough" transformer. Voltage under light loading rises considerably above nominal, and poses a threat of (...) (25 years ago, 26-Jan-99, to lugnet.robotics)
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Message is in Reply To:
| | Re: AC Adapter Specs?
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| I have looked on the RCX and I've noticed it does say "9-12V ~". From what I've gathered the "~" means polarity doesn't matter. My concern is the mA rating of 9 volt adapters. Radio Shack has about 6 different types each with a unique mA rating. (...) (25 years ago, 24-Jan-99, to lugnet.robotics)
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