Subject:
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Re: Power to RCX
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Newsgroups:
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lugnet.robotics.rcx
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Date:
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Sat, 2 Feb 2002 01:12:08 GMT
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Viewed:
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2826 times
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Hi Trevyn,
From the photo you posted, it appears that you have the input and output
pins of the 7805 reversed. According to the datasheet, this will probably
fry the regulator. I'd recommend getting a new part before continuing, so
as not to risk the RCX.
BTW, I like the way you used the ribbon cable to get the power inside
without any modifications to the RCX.
Good luck,
Mark
"Trevyn Watson" <4tee2@rogers.com> wrote in message
news:3C59E7FA.3000802@rogers.com...
> Most "wall wart" transformers give about 3-5 volts above what is marked
> on them. I would not use one of these directly. However, I am currently
> working on using a 7809 voltage regulator.
>
> If you don't know, a voltage regulator is a small electronic device with
> three pins - Input, Output, and Ground. If you connect a supply that is
> at least 3 volts higher than your output voltage, you will get your
> output voltage, in this case 9 volts.
>
> See http://members.rogers.com/swatsons/power1b.jpg for a picture of what
> I'm doing. It doesn't work yet, but I think that may be because i
> wrecked the regulator by heating it too much (with my soldering iron).
>
> I saw a web site where someone described how they did this, but I
> haven't been able to find it again.
>
> HTH
>
> Trevyn.
>
>
> Istvan TAKATS wrote:
>
> > Hi all,
> >
> > I just got my new RIS Ver.#2, and I am far from being an electronic • expert.
> >
> > I am wondering if a proper wall tranformer with an adapter inside the • RCX to
> > connect to the battery terminals would work for stationary application. • Of
> > course, I do not want to ruin my new toy.
> >
> > Could anyone knowledgable please enlighten me on this topic?
> >
> >
> > Thanks...
> >
> >
> >
> > Steve
>
>
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Message has 2 Replies:
 | | Re: Power to RCX
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| (...) Oops, me bad, I meant 7809. BTW, here are some links to online data sheets for that type of regulator: (URL) (23 years ago, 2-Feb-02, to lugnet.robotics.rcx)
| | | Re: Power to RCX
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| Success! It works now, and gives 9.2 volts according to the RIS software. You were right, I did have it backwards. Thanks. (...) (23 years ago, 5-Feb-02, to lugnet.robotics.rcx)
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Message is in Reply To:
| | Re: Power to RCX
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| Most "wall wart" transformers give about 3-5 volts above what is marked on them. I would not use one of these directly. However, I am currently working on using a 7809 voltage regulator. If you don't know, a voltage regulator is a small electronic (...) (23 years ago, 1-Feb-02, to lugnet.robotics.rcx)
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