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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Tue, 26 Jan 1999 05:50:06 GMT
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Original-From:
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Peter Thorup <pthorup@home#StopSpam#.com>
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Viewed:
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1352 times
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I had posed this question to Fred Martin at MIT who was involved in the
designing of the Programmable Brick/RCX and this was his response;
> lego designs its hardware so lots of adapters work. they basically
> build the brick so it's hard to blow it up. you can use a regulated
> adapter, but there's no need cause the cost is a lot more than the cheapo
> "wall warts" and the RCX was designed to work fine with unregulated
> adapters.
>
> the ~ means AC. in practice this means you can buy an AC output or DC
> output adapter. The RCX has a bridge rectifier inside it to turn AC
> into DC, or to turn DC of either polarity into the proper polarity.
>
> 9-12v, well that's pretty obvious. but you need to know the current
> rating in order to zero in.
>
> i recommend a 12v, 500 mA adapter. this has enough oomph for most
> applications.
>
> the Panasonic KXA11 is such a beast and is widely available in surplus
> from $3 to $5.
This is by no means an official response from The Lego Group.
Pete
Al Thiele wrote:
>
> 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 damage.
--
Did you check the web site first?: http://www.crynwr.com/lego-robotics
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Message is in Reply To:
 | | 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 (...) (26 years ago, 26-Jan-99, to lugnet.robotics)
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