Re: TI-H: REAL radio-link

To: ti-hardware@lists.ticalc.org
Subject: Re: TI-H: REAL radio-link
From: gussie@alaska.net (Grant Stockly)
Date: Mon, 23 Feb 1998 20:11:19 -0700
Reply-To: ti-hardware@lists.ticalc.org


making a radio link wouldn't be hard.  First get a chip from
www.national.com.  Look arround and find the chips that are made to
transfer data...  There is a chipset that uses 2 wire SPI serial...

If you can't do that then get 2 freqw and a regular chip.  Then get some da
ad converters.

>IS it possible to have one line modulate the amplitude and the other
>line modulate frequency. Then have a frequence counter and a level meter
>test the frequency and amplitude. never mind, I just realized why that
>would not work!
>
>New idea: Could a crystal generate a frequency high enough that the data
>can be multiplexed fast enough to avoid missing data???
>
>What about 4 separate frequencies SendTip, SendMid, RecTip, RecMid. You
>could have a switch to select whether your calc is 1 or 2. It is a
>little less "automatic", but by having the calcs set differently, you
>could send the data on two frequencies and recieve it on four
>frequencies. Maybe a little plug could be added, or dip switches used to
>select or switch crystals! You would carry two of the same crystal, and
>let the person you want to trancieve data with borrow one, or have
>several preset frequencies inside set by a switch. It would be VERY
>dificult to manualy tune it with a knob or something like that.
>
>Richard Piotter
>richfiles1@hotmail.com
>
>The Richfiles TI Page
>http://www.geocities.com/SiliconValley/Lakes/5081/Richfiles.html
>
>
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