Re: TI-H: Scanning Sonar

To: ti-hardware@lists.ticalc.org
Subject: Re: TI-H: Scanning Sonar
From: "Matthew H. Fogle" <cs239ac@chicoma.la.unm.edu>
Date: Tue, 25 Nov 1997 09:07:51 +0000
Organization: S.P.O.T. Enterprises
References: <19971125154930.11239.qmail@hotmail.com>
Reply-To: ti-hardware@lists.ticalc.org

Uh; I'm curious; where did you get the sonar unit in the first place? I
need to get one for the next robotic competition here.

Muhammed Galadima wrote:

> 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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References:

Re: TI-H: Scanning Sonar

From: "Muhammed Galadima" <mj_galadima@hotmail.com>