Subject:
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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 09:48:07 GMT
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Original-From:
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Richard Whitehead <RICHARD.WHITEHEAD@UKOS.nospamVARIAN.COM>
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Viewed:
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1852 times
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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 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 2 Replies:
 | | Re: Re[2]: IR Collision avoidance
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| (...) Richard, In my case there are two reasons. First, I'm not trying to find the actual distance. I just want to know if there is something within a particular range. I don't care if it's an inch away or a foot. The second reason is that I can get (...) (28 years ago, 3-Mar-97, to lugnet.robotics.handyboard)
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