Subject:
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Re: LEGO cuts the price of the RCX Brick
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Newsgroups:
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lugnet.robotics.rcx
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Date:
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Fri, 14 Jun 2002 23:20:03 GMT
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Viewed:
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3086 times
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"Todd Lehman" <todd@lugnet.com> schreef in bericht
news:GxptxE.CA5@lugnet.com...
> In lugnet.robotics.rcx, Scott Davis writes:
> > The RCX Bricks on sale are the 1.0 version.
>
> Hallelujah!
>
> > I think that they are just geting rid of them to make space in their
> > warehouses for other lego sets. The only diffference is 1.0 have a plug
> > so you can use an adapter and use your outlets instead of the batteries.
> > The 1.0 does accept the 2.0 firmware.
>
> A couple questions for someone with a multimeter:
>
> Does the 1.0 power adapter output a clean 9v DC? Or does it • overcompensate --
> at, say, 9.3v -- like other cheap wall adapters?
If the LEGO US 110v adapter is similair to the Europe 220v adapter in terms
of output : it outputs around 9.2-11.4v AC (note the AC, DC might burn out
the diodes in the RCX as I read somewhere a while back. 11.4 is without ANY
load... drops to about 10v under light load)
http://www.crynwr.com/lego-robotics/ has some more details.
> Does the voltage drop by
> more than 1% while powering a couple motors?
Yeah, a little bit when running 3 motors. I see drops of about 0.3-0.5v
Doesn't have any serious effect on the motors though.
> Does the output voltage depend
> on your wall voltage (e.g., 110v/115v/120v) or does the adapter contain a
> power regulator circuit outputting a known voltage regardless of the • accuracy
> of the input voltage?
No electronics whatsoever if you ask me... hard to say unless I open up one,
but resistance indicates the ouput comes straight from the secundary
windings of the transformator inside the wall adapter (ie is almost 0)
--
Jan-Albert "Anvil" van Ree | http://artsen.vanree.net
VanReeDotNet IT Solutions | http://www.vanree.net
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Message is in Reply To:
 | | Re: LEGO cuts the price of the RCX Brick
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| (...) Hallelujah! (...) A couple questions for someone with a multimeter: Does the 1.0 power adapter output a clean 9v DC? Or does it overcompensate -- at, say, 9.3v -- like other cheap wall adapters? Does the voltage drop by more than 1% while (...) (22 years ago, 14-Jun-02, to lugnet.robotics.rcx)
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