Re: TI-H: Scanning Sonar

To: ti-hardware@lists.ticalc.org
Subject: Re: TI-H: Scanning Sonar
From: "Muhammed Galadima" <mj_galadima@hotmail.com>
Date: Tue, 25 Nov 1997 15:49:29 GMT
Reply-To: ti-hardware@lists.ticalc.org


The speed of sound calibration part is easy: just do speed_sound = 331 + 
0.6 * temperature

>Since TI85s don't have built in timers, I'd suggest an external 555 
yes, that's great idea! but how can it be interfaced with the calc? can 
will Matthew's I/O expander do the trick?

>you described and 2) a Terrain Style

what do you mean by terrain style? is it elevations?

>I'm still realtivly new to electronics but seems like a pic might be
>over-kill for a simplesend-time-stop-reset circut.  If anybody could
>hardwire one of these things I'd probably pay.
>

you're right, the PIC is definitely overkill

Mj

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Re: TI-H: Scanning Sonar

From: "Matthew H. Fogle" <cs239ac@chicoma.la.unm.edu>