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- Newsgroups: sci.electronics
- Path: 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
-
- 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
-