NetNews Usenet Archive 1992 #31/NN_1992_31.iso/spool/sci/electron/21778

Text File | 1992-12-30 | 1.6 KB | 33 lines

Newsgroups: sci.electronics
Path: sparky!uunet!zaphod.mps.ohio-state.edu!magnus.acs.ohio-state.edu!usenet.ins.cwru.edu!gatech!destroyer!cs.ubc.ca!news.UVic.CA!spang.Camosun.BC.CA!freenet.victoria.bc.ca!ua123
From: [e-mail] (Matthew A. Skala)
Subject: IR remote controls info?
Message-ID: <[e-mail]>
Sender: [e-mail] (Network News)
Nntp-Posting-Host: freenet.victoria.bc.ca
Reply-To: [e-mail] (Matthew A. Skala)
Organization: The Victoria Freenet Association (VIFA), Victoria, B.C. Canada
Date: Wed, 30 Dec 1992 17:56:45 GMT
Lines: 20



I'm an independent student working on a project where I need to have a computer
send IR remote control commands to a VCR to start and stop a tape.  I'd like
it to be able to work with many different VCRs and so I need a way for it to
"learn" the command sequence to send and then send it.  I know this is possible
because those "universal" remotes exist which can record a command sequence and
then play it back well enough to fool the VCR.  The simplest approach would be
to just hook an IR phototransistor and an IR LED to the 'pooter, have it sample
the command at a suitable rate, and then play it back out of the LED.  Trouble
is, I believe some remote controls send their data by modulating a carrier, and
so my sampling rate would have to be high enough to capture the carrier
frequency.  This might be impractical.

Does anybody have any suggestions?  Please reply by EMail and I will post a
summary of the responses I get.
--
CENSORSHIP SUCKS!  UP WITH THE PEOPLE!

Matthew Skala - VE7MSK - [e-mail]