Article View: sci.electronics
Article #17234Re: IR remote control
From: got
Date: Tue, 03 Feb 1987 08:51
Date: Tue, 03 Feb 1987 08:51
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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! ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ Sunil Gupta | Bitnet: got@psuecl, got@psuarch, got@psuvma P enn | : sunil@psuvaxg S tate | U niversity | UUCP : ihnp4!psuvax1!psuvaxg!sunil E ngineering | : ihnp4!psuvax1!psuecl.bitnet!got C omputer | L ab | ARPA : got%psuecl.bitnet@wiscvm.arpa
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Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Path: arc1-ca.pugleaf.net!utzoo!watmath!clyde!rutgers!ucla-cs!sdcrdcf!burdvax!psuvax1!psuvm.bitnet!got 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 References: <3090@utai.UUCP> 1247@frog.UUCP Lines: 28