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Article #17234

Re: IR remote control

#17234
From: got
Date: Tue, 03 Feb 1987 08:51
28 lines
1857 bytes
First a good way to tell whether the siganl is being repeated or a
special repeat code is being used is to watch the LED that indicates
you pressed a button...it's usually connected in some way to the
signal that goes to the IR LED.

Second, I bought a Motorola IR chipset, and it uses frequency modualtion
to encode bits.  a low frequency shift to a high frequency shift
represents a zero, and visa versa.  Such a scheme may make it very
hard to use a scope and or a logic analyzer to detect.

See if you can get info on the chipset used in your transmitter/receiver
from SONY or whoever made the chips.  Just call a repair center (not
a dealer) and ask someone if they can send you a copy, maybe SONY even
sells data sheets, although thats doubtful.

Lastly, you could buy the chipset I bought and make your own control
center like I am...I will have complete control of every component of
my stereo except the EQ from one SMALL transmitter.

good luck!
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From: got@psuvm.bitnet.UUCP
Newsgroups: sci.electronics
Subject: Re: IR remote control
Message-ID: <10007GOT@PSUVMA>
Date: Tue, 3-Feb-87 03:51:46 EST
Article-I.D.: PSUVMA.10007GOT
Posted: Tue Feb  3 03:51:46 1987
Date-Received: Thu, 5-Feb-87 03:57:33 EST
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