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From: jerryw@teksce.SCE.TEK.COM (Jerry Willard)
Newsgroups: sci.electronics
Subject: R/C Circuit needed
Message-ID: <3162@teksce.SCE.TEK.COM>
Date: 14 Mar 90 16:45:05 GMT
Sender: jerryw@teksce.SCE.TEK.COM
Reply-To: jerryw@teksce.SCE.TEK.COM (Jerry Willard)
Distribution: usa
Organization: Tektronix, Inc., Beaverton,  OR.
Lines: 17

I've posted an inquiry into this subject before, but I didn't get any
practical solutions.

I want my alarm clock to turn on my TV instead of a radio.  So, I want to
redirect the turn-on voltage to a circuit that will pulse an LED with the
correct data stream.  The obvious solution is to get the IC from inside the
TV's remote transmitter and toggle it.  But that IC is no longer available.

So, I need to duplicate the turn-on sequence of that IC.  Fortunately, I
have the data sheet for the IC.  Unfortunately, it isn't clear what the
bit-for-bit stream is for each function.  I've tried beaming the transmitter
into a photo detector and studying the waveform on a scope: pretty jumbled.
Still, it looks like deciphering the transmitter output is my best option.
Any suggestions?

Jerry Willard,  Tektronix
jerryw@teksce.SCE.TEK.COM