Newsgroups: comp.robotics
Path: brunix!sgiblab!spool.mu.edu!howland.reston.ans.net!usc!elroy.jpl.nasa.gov!decwrl!netcomsv!netcom.com!nstn
From: nstn@netcom.com (Nathan Stratton)
Subject: Re: Ultrasonic Range Finder
Message-ID: <nstnCovn49.Byx@netcom.com>
Organization: Netcom Online Communications Services (408-241-9760 login: guest)
References: <2ovhtv$9ut@wizard.uark.edu> <2p8mnr$cdc@clarknet.clark.net> <Cov4uy.JJu@cs.vu.nl>
Date: Tue, 26 Apr 1994 17:26:32 GMT
Lines: 27

In article <Cov4uy.JJu@cs.vu.nl> ekoperen@cs.vu.nl (Ellert van Koperen) writes:
>g.Preston (gregpres@clark.net) wrote:
>
>:   I believe the Polaroid pings on 
>: 3 different frequencies with each sampling.
>
>: 	-Greg-
>
>What kind of speaker/microphone does one use for this?
>
>
>Greetz, Ellert.
>--
>/* Try me and stagger. With x size as parameter! y size=auto scaling!*/float R,
>y=1.5,x,r,A,P,B;int u,h=80,n=80,s;main(c,v)int c;char **v;{s=(c>1?(h=atoi(v[1]
>)):h)*h/2;for(R=6./h;s%h||(y-=R,x=-2),s;4<(P=B*B)+(r=A*A)|++u==n&&putchar(*((( 
>--s%h)?(u<n?--u%6:6):7)+"World! \n"))&&(A=B=P=u=r=0,x+=R/2))A=B*2*A+y,B=P+x-r;}
Ya, you nee 50 Khz ultrasonic transducer if you need to use the Polaroid 
boards.



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 | Nathan Stratton              Washington and Lee High School Junior        | 
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