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From: psfales@cbnewsc.att.com (Peter Fales)
Newsgroups: sci.electronics
Subject: Re: TV remote control codes
Message-ID: <1991Feb10.214125.15759@cbnewsc.att.com>
Date: 10 Feb 91 21:41:25 GMT
References: <2407.27B2CBE1@ofa123.fidonet.org> <43935@ut-emx.uucp>
Organization: AT&T Bell Laboratories
Lines: 24

In article <43935@ut-emx.uucp>, greg@ccwf.cc.utexas.edu (Greg Harp) writes:
> This looks like a good time to jump in with a question I thought of this 
> morning.  I came up with the (probably not very original) idea of "digitizing"
> remote control codes with my computer and playing it back via software 
> control.  Then not only could I add timing features to my audio/video 
> equipment, but I wouldn't have a pile of remotes to deal with.  (No, I don't
> like those universal remotes.)

Check out the March 1987 issue of Byte.  The "Circuit Cellar Ink" column
describes hardware and software to build your own "Trainable Infrared
Master Controller."  To really do the job right, you need to sample at a
much higher frequency than the carrier of the IR signal you are attempting
to reproduce and this probably requires special hardware.

I built a box using the ideas in this article, though I used different
hardware implementation.  It includes both an Ultrasonic and IR transmitter
so that it can control my X-10 devices using the (no longer available?) 
ultrasonic base station as well as devices with IR remotes.  A fun toy.

-- 
Peter Fales			AT&T, Room 5B-420
N9IYJ            		2000 N. Naperville Rd.
UUCP:	...att!ihlpb!psfales	Naperville, IL 60566
Domain: psfales@ihlpb.att.com	work:	(708) 979-8031