Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!csd4.milw.wisc.edu!indri!unmvax!tut.cis.ohio-state.edu!rutgers!att!ihlpb!psfales
From: psfales@ihlpb.ATT.COM (Peter Fales)
Newsgroups: sci.electronics
Subject: Re: Help with infrared remote circuit
Message-ID: <10278@ihlpb.ATT.COM>
Date: 21 Apr 89 04:27:37 GMT
References: <8255@boulder.Colorado.EDU>
Organization: AT&T Bell Laboratories - Naperville, Illinois
Lines: 28

In article <8255@boulder.Colorado.EDU>, colonbon@boulder.Colorado.EDU (Glenn T. Colon-Bonet) writes:
>   2. build an external infrared detector which will recognize the 'power'
>      button sequence and switch the AC output on/off.
> I would prefer option 2, mostly because it sounds like the most fun to build,
> and doesn't require voiding the warranty!
> 
>    I would like to know if anyone has worked with infrared remotes and
> knows what kind of protocols are used, is it asynch with start/stop pulses
> and some kind of encoding for the keys on the remote?  Also, I am not
> sure of how to go about amplifying the signal detected, I presume, 
> from an infrared photodiode detector. 

In the February and March, 1987 issues of Byte magazine, Steve Ciarcia
had a couple of projects dealing with IR remote controls.  In the February
issue, he described how to build a tranmsitter and receiver using commercial
chips.  For example, the Motorola MC3373 is general purpose IR receiver
chip that could be used in your device.

In the March issue he describes IR controllers in general terms and
how to build a "trainable" controller which can imitate the signals
produced by almost any controller on the market.  (I built a controller
based on his ideas, it's a great toy).

-- 
Peter Fales			AT&T, Room 5B-414
				2000 N. Naperville Rd.
UUCP:	...att!ihlpb!psfales	Naperville, IL 60566
Domain: psfales@ihlpb.att.com	work:	(312) 979-8031