Subject:
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Re: ir obstacle detector
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Newsgroups:
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lugnet.robotics.handyboard
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Date:
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Tue, 10 Dec 1996 03:16:30 GMT
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Original-From:
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MAR ERICSON <{mar@cooper.}Spamcake{edu}>
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Viewed:
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3628 times
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Is this because you used a "bright" IR led?
Or perhaps the frequency is high, thus higher energy EM radiation?
> > > Included in the fax they send you is a schematic for a transmitter and
> > > receiver. I used the transmitter and then, since I wasn't interested in
> > > decoding the signal, I used the output as it was, with a capacitor to do
> > > a bit of smoothing. Connected it to the Handy/Mini board analog sensor
> > > inputs and it gives a distinct level change as an object gets to within
> > > about 20 cm.
> >
> > Why is the distance do short?
> > You can use a remote control for a TV or someting from really far away and even bounce the IR off walls.
> > Doesn't that mean that you can do the same for a sensor?
> > Or is it that the current generation of phototransistors are not sensitive enough?
> > Or am I totally off and asking a dumb question? :)
> >
> > -e
>
>
> I have been able to go a couple inches with just a simple infrared
> emitter and detecter but I would like to be able to do (similar to what
> you say) bounce it off the wall and back to the tv (12 feet each way) as my
> remote can do with my tv.
>
> Scott
> sherman@plains.nodak.edu
>
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