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- Xref: sparky sci.electronics:20853 comp.robotics:2657
- Newsgroups: sci.electronics,comp.robotics
- Path: sparky!uunet!utcsri!torn!newshub.ccs.yorku.ca!newshub.ariel.yorku.ca!cs911225
- From: cs911225@ariel.yorku.ca (KEN E WILLMOTT)
- Subject: Re: Infrared remote controls
- Message-ID: <1992Dec16.161855.26944@newshub.ariel.yorku.ca>
- Keywords: infrared HC11
- Sender: news@newshub.ariel.yorku.ca (USENET News System)
- Organization: York University, Toronto, Canada
- References: <of90_cC00UhB465rsp@andrew.cmu.edu> <1992Dec15.123639.7460@nntpd.lkg.dec.com>
- Date: Wed, 16 Dec 1992 16:18:55 GMT
- Lines: 21
-
- I tried deciphering the IR remote control signals as well, by
- connecting a surplus receiver to one of my HC11's input capture pins.
- Software stored timer values in a list, producing the effect of
- a digital oscilliscope.
-
- Trusty calculator in hand, I then puzzled for several days over
- the printouts. I found several "layers" of encoding as I went along.
- I never did reach a point where I felt I knew enough to produce
- an ad hoc data sheet, but I did learn more than is in the "zapper"
- documentation.
-
- My latest project, which is on a back burner due to schoolwork,
- is the transmit portion. The hardware part has been prototyped, and
- uses a PLL frequency multiplier which is locked to a reference
- squarewave from the HC11.
-
- Having a dedicated realtime processor with the I/O features of
- the HC11 was enormously helpful, toward this end.
-
- -Ken
-
-