Subject:
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Re: Use RCX motor output to switch devices
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Newsgroups:
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lugnet.robotics
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Date:
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Wed, 28 Aug 2002 16:10:26 GMT
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Viewed:
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1057 times
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You certainly could use the optcoupler out of a computer mouse, but that
wouldnt be the best may to do it. They wouldnt be designed with this
application in mind, so you might fry the phototransistor if you used
too much current, or too high a voltage. Also, the LED inside might be
designed with a resistor built in, or it might not. There's really no
way to find out. Also also, they have a bit of a gap in between the LED
and the phototransistor (for the encoder wheel). You'd have to cover
this with something to stop stray light from interfering. (of course,
that's all IMHO)
My advice is to buy them new. That way, you can get a data sheet, and
you know exactly what you're getting. As for places to buy them, Digikey
(http://www.digikey.com) is a very good supplier of electronic
components. See http://info.digikey.com/T022/V5P5.html for the page on
optoelectronics in their catalog. I don't know if they ship to where you
live, though. If you live in a reasonably large city, there's a good
chance you can find an electronic components store there. Look in your
Yellow Pages (or local equivalent) under something like "Electronics".
Trevyn.
Da Byte wrote:
>
> Thanks a lot, Dean!
>
> Total electrical isolation is a good idea to achieve what I'm planning to
> do. I am trying to switch circuits of various Voltages (a 12V circuit at the
> moment in the form of an IR beamer).
> Do you have any information on both creating and buying (parts of) these
> optoisolators? Could one use parts of old (computer) mice?
>
> Thanks again!
>
> Remko
>
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Message is in Reply To:
 | | Re: Use RCX motor output to switch devices
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| (...) Thanks a lot, Dean! Total electrical isolation is a good idea to achieve what I'm planning to do. I am trying to switch circuits of various Voltages (a 12V circuit at the moment in the form of an IR beamer). Do you have any information on both (...) (22 years ago, 28-Aug-02, to lugnet.robotics)
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