Re: TI-H: E and Radio Link

To: ti-hardware@lists.ticalc.org
Subject: Re: TI-H: E and Radio Link
From: Gregory Whitmore <whitmore@eatel.net>
Date: Thu, 14 May 1998 08:24:46 -0500
Delivered-To: ti-hardware-outgoing@towerguard.unix.edu.sollentuna.se
References: <v02110108b1801424f16a@[192.168.1.250]>
Reply-To: ti-hardware@lists.ticalc.org


Sounds like a good idea, but wouldn't that cause some legal problems? You'd be
stepping way into the cellular phone band. Not the old analog phones, but the new
digital PCS phones. You might want to do some checking on that.

Grant Stockly wrote:

> I'm going to use a different plan for the radio link/
>
> I've been waiting for a long *long* time for his schematics and havn't
> gotten them/  So I'm going to use the same technology used in wireless
> ethernet/
>
> The radio links will operate at 1.9GHz and use about 900mW full speed (110k
> per sec)/  It also depends on the distance/  The radio link will amp up the
> signal to a max of 26db if it needs too/  I don't know how far it will
> transmit/  Your regular cordless phone operates at 900MHz (this is
> 1900MHz)/
>
> Anyway, this scheme will work better/  I thinking I can get about 57600
> perfectly and maybe 110 if I hack it a little/
>
> The main Transciever chip cost $9 and the amps cost $4.  The AVR cost
> $4.50/  Then you need a few other misc parts/  Too bad its a 44, 18, 20 pin
> surface mount deal.  :)  Unless you guys all have rework stations, we'll
> have to find a fab company to make them/  These things should get the range
> of a cel phone within a single cell/
>
> I ordered a set of 5 of the chips last night and they'll be here sometime soon/
>
> As for the E, I think it would be cool to put a transciever in your locker
> so you would only have a box the size of a cel phone, but you could have
> toons of eeprom or other storage/

References:

TI-H: E and Radio Link

From: gussie@alaska.net (Grant Stockly)