Subject:
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Re: sonar
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Newsgroups:
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lugnet.robotics.handyboard
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Date:
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Mon, 18 Nov 1996 00:16:13 GMT
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Original-From:
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MAR ERICSON <mar@cooper.SPAMLESSedu>
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Viewed:
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1261 times
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> I was paging through the digikey catalog and found some pairs of
> ultrasonic transducers and recievers for about $12 a pair. Does anyone
> know where I can get information regarding setting these up for sonar,
> either from their own experience or possibly from some application notes
> someplace or even on the web? I would really like to add sonar to my
> handyboard but $50 fir a polariod unit is far to prohibative. Thank you.
> ---
> Garth Webb
> g-webb@uiuc.edu
I think I found your treasure. It's under "Audio, Buzzers, Microphones, Speakers..." right? ...Panasonic ceramic devices?
This is my input:
I have a Polaroid unit. This is what it looks like. There is ONE transducer and a ranging module(driving circuit). The transducer acts as both a "speaker" and a "microphone" as opposed to separate units in the Panasonic case.
So...someone correct me if I'm wrong...the Digikey things are missing the driving circuitry. As an analogy to the Polariods, you only get the "speaker" and "microphone" part. Thus you have to build this yourself which will cost some $.
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Message has 1 Reply:
 | | Re: sonar
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| (...) yes. the polaroid board is pretty sophisticated, really, in that it ramps up the input gain the longer it waits for the ultrasonic reflection pulse. this compensates for the exponential falloff in "volume" as sound disperses on the way out and (...) (28 years ago, 18-Nov-96, to lugnet.robotics.handyboard)
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Message is in Reply To:
| | sonar
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| I was paging through the digikey catalog and found some pairs of ultrasonic transducers and recievers for about $12 a pair. Does anyone know where I can get information regarding setting these up for sonar, either from their own experience or (...) (28 years ago, 17-Nov-96, to lugnet.robotics.handyboard)
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