Subject:
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Re: rcx 1.0 and an ac adaptor
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Newsgroups:
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lugnet.robotics.rcx
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Date:
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Wed, 9 Feb 2000 19:01:15 GMT
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Viewed:
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1847 times
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In lugnet.robotics.rcx, Dave Johnson writes:
> Jeff Canar wrote:
>
> > (1) Do i have to worry about polarity?
> According to Knudsen's book, AC or DC in either polarity is fine (which
> is great!). That's the only place I've seen the input characteristics
> mentioned, is there an "official" spec anywhere?
>
> One thing you might want to be careful of: I read before that people have
> "blown up" the input jack (though not the RCX) by using adapters that can
> provide too much current. I believe anything up to an amp (1000 mA) is
> safe. Again, is there an official spec on this?
>
> > (2) Can i just leave the batteries in all
> > the time, even when i have the rcx plugged into the wall?
> Yes, that's fine, typically when you plug an external power source in, it
> just bypasses the batteries.
The 'official' adapter, is 10VAC, 0.7A. I have seen one person who blew the
rectification bridge, and he simply replaced this himself ((it was an old
unit). There are two 'possibly combined' problems. DC, puts all the load on
just one pair of diodes in the bridge, and the people having problems have
been using sources capable of delivering significantly more current (things
like heavy battery packs quite capable of delivering several amps into a short
circuit)...
Best Wishes
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Message is in Reply To:
 | | Re: rcx 1.0 and an ac adaptor
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| (...) According to Knudsen's book, AC or DC in either polarity is fine (which is great!). That's the only place I've seen the input characteristics mentioned, is there an "official" spec anywhere? One thing you might want to be careful of: I read (...) (25 years ago, 8-Feb-00, to lugnet.robotics.rcx)
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