> -----Original Message-----
> From: Martin.Buehler@KEYMILE.COM [SMTP:Martin.Buehler@KEYMILE.COM]
> Sent: Friday, November 22, 2002 7:11 AM
> To:   PICLIST@mitvma.mit.edu
> Subject:      IR Remote Control Codes. Does no one use RC5?
>
> i implemented an ir receiver in a pic 16f628. i did this according to some
> rc5 code information, i found on the web.
>
> now i tried this out with remote controls from pioneer, sony, panasonic,
> united, jvc,...but none worked.
>
> checking the signal with an oszilloscope, i found it to be very different
> from what i expected.
> i thought that everybody uses some bi-phase coded rc5 code with 880us bit
> timing, but...
> ...what i found is some very slow 1-0 sequence, looking like some kind of
> synchronization, followed by an 1-0 sequence pattern, where some 1 pulses
> miss some times.
>
> does anybody have information on this code, most manufacturers seem to
> use?
>
Any manufacturer is free to use their own encoding method, there is very
little standardisation.  You are probably seeing a varitaion on the REC-80
encoding method, where  the bits are encoded as varying length spaces.
FWIW, if you can find a Philips remote, that will probaly use RC5.

Take a look at http://www.innotechsystems.com/primer1.pdf for a brief
description of each method. http://www.epanorama.net/links/irremote.html
also has lot of usefull information.

Mike

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