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- From: cmcmanis@pepper.Eng.Sun.COM (Chuck McManis)
- Newsgroups: sci.electronics,comp.robotics
- Subject: Re: Infrared remote controls
- Date: 12 Dec 1992 07:42:59 GMT
- Organization: Sun
- Lines: 37
- Message-ID: <lij603INN3p6@exodus.Eng.Sun.COM>
- References: <of90_cC00UhB465rsp@andrew.cmu.edu>
- NNTP-Posting-Host: pepper
-
- In article <of90_cC00UhB465rsp@andrew.cmu.edu> jmce+@andrew.cmu.edu (James Ryan Miller) writes:
- >
- > I am trying to find information on how infrared tv remote controls
- >send signals. I have one of those infrared receivers from Radio Shack
- >hooked up to my 68HC11EVBU board, and have been experimenting with
- >trying to program it to read the buttons off a remote control for a Sony
- >Trinitron tv.
-
- If you can find an older General Instrument catalog, look up part
- AY-3-8470 this is an infrared transmitter chip. There is also a receiver
- equivalent. Anyway, besides the interesting tidbits on IR receivers
- they use a code whereby they send the 8 bits of data, and then send
- the 8 bits inverted, this 'double' byte allows the receiver to
- differentiate between spurious inputs and real signals.
-
- Other interesting references :
- "Use Infrared Communication for Remote Control", Steve Ciarcia,
- BYTE April '82, and Ciarcia's Circuit Cellar Volume IV.
-
- "The Robot Builder's Bonanza", Gordon McComb, published by
- TAB books Pg 255-261. ISBN #0-8306-2800-2
-
-
- However the absolutely best advice I can give you is to stop trying
- to figure out the Sony remote. Instead, wire up an infrared diode
- and a uart and that you can use to "train" one of these programmabe
- remotes (I got one from Radio Shack for $30 on sale once). Then you
- can design your own protocol pretty much and you always know what the
- transmitter will send when you hit the "1" key. :-)
-
-
-
- --
- --Chuck McManis Sun Microsystems
- uucp: {anywhere}!sun!cmcmanis BIX: <none> Internet: cmcmanis@Eng.Sun.COM
- NIS+ Architect
- These opinions are my own and no one elses, but you knew that didn't you.
-