Re: TI-H: Scanning Sonar

To: ti-hardware@lists.ticalc.org
Subject: Re: TI-H: Scanning Sonar
From: "ryan pogge" <ryanpogge@hotmail.com>
Date: Wed, 26 Nov 1997 06:36:07 PST
Reply-To: ti-hardware@lists.ticalc.org
http://www.edocorp.com/indust/acoustic/products/navprod.html
try this, they make em


>From listown@towerguard.unix.edu.sollentuna.se Tue Nov 25 23:47:27 1997
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>From: "Muhammed Galadima" <mj_galadima@hotmail.com>
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>Subject: Re: TI-H: Scanning Sonar
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>Date: Wed, 26 Nov 1997 07:43:10 GMT
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>Polaroid makes them, and I think Fujitsu does too but I'm not sure.
>
>Couldn't IR proximity detectors be used instead? They would be alot 
>cheaper and the hardware is easy to find on the net.  ...of course IR 
it 
>has its own problems...
>
>
>Mj
>
>
>>
>>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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>>
>>
>>
>>
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