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Article #17231

Re: IR remote control

#17231
From: levy
Date: Sun, 01 Feb 1987 05:39
25 lines
1957 bytes
In article <5367@ism780c.UUCP>, tim@ism780c.UUCP writes:
>In article <3090@utai.UUCP> dudek@utai.UUCP (Gregory Dudek) writes:
>>    I have a SONY TV at home with a RM-729 remote control.  I was
>>wondering if anybody knew the protocol the remote uses to talk
>>to the TV.  Are the signals these things send standardized to any
>I don't know what protocol Sony uses, but I once wanted to know how
>these things worked.  This worked for me, maybe it will work for you:
>	1. Get a photodiode from Radio Shack....
>	3. Borrow an oscilloscope from the hardware guy in step 3.
>	Set it up to measure the voltage across the diode.
>	4. Point the remote control at the diode and fire away,
>	observing the signal on the 'scope.

Wouldn't it have been simpler to use the 'scope to look at the voltage
driving the remote control's LED (presuming the unit could be nondestructively
opened up)?
>Tim Smith       USENET: sdcrdcf!ism780c!tim   Compuserve: 72257,3706
-- 
 -------------------------------    Disclaimer:  The views contained herein are
|            dan levy            |  my own and are not at all those of my em-
|         an engihacker @        |  ployer or the administrator of any computer
| at&t computer systems division |  upon which I may hack.
|        skokie, illinois        |
 --------------------------------   Path: ..!{akgua,homxb,ihnp4,ltuxa,mvuxa,
                                        allegra,ulysses,vax135}!ttrdc!levy
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Message-ID: <1487@ttrdc.UUCP>
Path: arc1-ca.pugleaf.net!utzoo!watmath!clyde!cbatt!ihnp4!cuae2!ltuxa!ttrdc!levy
References: <3090@utai.UUCP> <5367@ism780c.UUCP>

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Path: arc1-ca.pugleaf.net!utzoo!watmath!clyde!cbatt!ihnp4!cuae2!ltuxa!ttrdc!levy
From: levy@ttrdc.UUCP
Newsgroups: sci.electronics
Subject: Re: IR remote control
Message-ID: <1487@ttrdc.UUCP>
Date: Sun, 1-Feb-87 00:39:45 EST
Article-I.D.: ttrdc.1487
Posted: Sun Feb  1 00:39:45 1987
Date-Received: Tue, 3-Feb-87 06:43:54 EST
References: <3090@utai.UUCP> <5367@ism780c.UUCP>
Organization: AT&T, Computer Systems Division, Skokie, IL
Lines: 25