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Article #7110Re: Need encoding scheme for TV remote infrared controller
From: Wayne
Date: Thu, 03 Sep 1992 17:12
Date: Thu, 03 Sep 1992 17:12
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In article <1992Sep2.181547.28000@aio.jsc.nasa.gov> mancus@zaphod.jsc.nasa.gov (Keith Mancus) writes: > Odd. I've seen "generic" controllers that can be programmed to >drive a wide variety of remote-controlled devices. It seems pretty >difficult to do this w/out any standards! > >> Borrow/obtain an oscilloscope....after playing around a bit, >>you should be able to determine the encoding scheme used, or at the very >>least which patterns go with which.... > > <groan> That's just what I was hoping to avoid. Sigh. > It can be done without an oscilloscope, if you have a microprocessor with a timer handy you can program it to time the high and low periods. I have done this successfully with a few different controllers. From this information you should be able to differentiate between button presses. This technique may not be effective if you want to emulate the transmitter because of time delays produced by the reciever but is fine if you want to build something that operates off of a already available transmitter like you do. -- Wayne Dawe wayne@r-node.UUCP
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Newsgroups: sci.electronics Path: arc1-ca.pugleaf.net!sparky!uunet!uunet.ca!geac!r-node!wayne From: wayne@r-node.gts.org (Wayne) Subject: Re: Need encoding scheme for TV remote infrared controller Message-ID: <1992Sep03.171239.21834@r-node.gts.org> Organization: Public Access UNIX Information System References: <1992Sep2.003540.24065@aio.jsc.nasa.gov> <BtyE2K.3ts@news.cso.uiuc.edu> <1992Sep2.181547.28000@aio.jsc.nasa.gov> Date: Thu, 03 Sep 1992 17:12:39 GMT Lines: 23