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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Fri, 1 Feb 2002 00:57:30 GMT
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Viewed:
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2917 times
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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 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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| 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 (...) (23 years ago, 2-Feb-02, to lugnet.robotics.rcx)
| | | Re: Power to RCX
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| I investigated this issue a while back an have taken apart all four of my RCX's (1.0 w. adapter, 1.0 w/o adapter, and 2 2.0's from an RIS1.5 and and RIS2.0). They all have internal voltage regulators. I've written the number down somewhere on this (...) (23 years ago, 2-Feb-02, to lugnet.robotics.rcx)
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Message is in Reply To:
| | Power to RCX
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| 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 (...) (23 years ago, 1-Feb-02, to lugnet.robotics.rcx)
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