Re: TI-H: Band pass filtering

To: ti-hardware@lists.ticalc.org
Subject: Re: TI-H: Band pass filtering
From: Grant Stockly <gussie@alaska.net>
Date: Sun, 18 Oct 1998 22:06:14 -0800
Delivered-To: ti-hardware-outgoing@towerguard.unix.edu.sollentuna.se
In-Reply-To: <362AD05E.2817@geocities.com>
References: <Pine.LNX.3.96.981018174433.1488A-100000@morph> <v04020a06b2506c0fcb71@[192.168.1.66]>
Reply-To: ti-hardware@lists.ticalc.org


Heading into GHz range now in time is almost the same...  With microwaves,
PCS phones, cordless phones, you name it (Cordless phones and microwaves
are bandwidth hogs) you probably aren't going to get much distance.
Sub-microwave freqs are sometimes free, but most are cluttered with UHF
TV...


>I can't argue with the ease of designing an IR link, but what if he is
>doing RF?  You cannot claim that it's just as easy, because IR "noise"
>is generally a lot easier to clean up than the random crap that messes
>up most amateur (not ham) radio setups.  unless you really know what you
>are doing, you won't get clean transmissions without heading into the
>GHz range.  Of course, that kills the range.
>
>CK
>
>Grant Stockly wrote:
>>
>> IR is good.  Just modulate the signal.  I posted schematics for the new
>> sony receivers.  Works great!
>>
>> All you need are 4 transmitters and 4 receivers for each link.
>>
>> Then you'll need to make 4 simple osc circuts for your chosen parts.  Thats
>> about it.
>>
>> THe one I made worked 10 feet (AMP IT! :) ), but I ripped it apart to make
>> a laser tag thing for my 8 year old brother.  :\
>>
>> Grant

References:

TI-H: Band pass filtering

From: morph- <morph@jmss.com>

Re: TI-H: Band pass filtering

From: Grant Stockly <gussie@alaska.net>

Re: TI-H: Band pass filtering

From: Christopher Kalos <raptorone@geocities.com>