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From: rrw@naucse.cse.nau.edu (Robert Wier)
Newsgroups: sci.electronics
Subject: ultrasonic rangefinder
Message-ID: <2727@naucse.cse.nau.edu>
Date: 22 Oct 90 05:37:42 GMT
Distribution: na
Organization: Northern Arizona University, Flagstaff AZ
Lines: 29


 Many thanks to those who responded on my query on the 
 poloroid ultrasonic distance measuring unit.  Several
 suggested that I check out the units being sold at 
 hardware stores for < $20, which I intend to do.

 I note also that in the current Circuit Cellar INK, 
 they have a "sonar ranging experimenter's kit" for 
 $79.  They note that with a 5 v power supply it's TTL
 compatible, measuring from 1.2" to 35' (but they don't
 give an error range).

 Having never built any of these (or other Circuit Cellar
 kits), I wonder if anyone is familiar with them.  How is
 the quality of the kit?  How fast is shipping?  The do
 promise that "you get a level of technical support unsurpassed
 in the industry."

 Please either respond directly or post here.

 THANKS!

 - Bob Wier

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                      College of Engineering
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