Subject:
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Re: Re[2]: IR Collision avoidance
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Newsgroups:
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lugnet.robotics.handyboard
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Date:
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Mon, 3 Mar 1997 14:08:45 GMT
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Original-From:
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Adam <adam@ring.zenox#spamcake#.com>
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Viewed:
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2245 times
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Richard,
I've tried the op-amp method and had some success. I just don't
know how I would power the -5V via the HB. Do you have any
suggestions? Thanks.
On Mon, 3 Mar 1997, Richard Whitehead wrote:
>
> Bill,
>
> Why is everyone using a digital device to try to detect the (analogue)
> distance to an object? Especially one with AGC, it makes no sense!
>
> I modulated the IR at 10KHz (high enough to be away from mains light
> flicker, but out of the way of the remote control band), and am using
> an analogue op-amp demodulator circuit to detect the strength of the
> reflected signal.
>
> It is basically working, but I am just changing to a different op-amp
> to get rail-to-rail operation.
>
> Richard
>
>
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Message has 1 Reply:
 | | Re: IR Collision avoidance
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| (...) The Sharp IR modules are not being used to detect distance, they are being used simply as non-contact bumpers. This allows one to inexpensively put an arbitrarily long 'whisker' on your robot. The advantage to these things are that they are (...) (28 years ago, 3-Mar-97, to lugnet.robotics.handyboard)
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Message is in Reply To:
| | Re[2]: IR Collision avoidance
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| Bill, Why is everyone using a digital device to try to detect the (analogue) distance to an object? Especially one with AGC, it makes no sense! I modulated the IR at 10KHz (high enough to be away from mains light flicker, but out of the way of the (...) (28 years ago, 3-Mar-97, to lugnet.robotics.handyboard)
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