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From: chinn@butler.UUCP (David Chinn)
Newsgroups: net.video
Subject: Composite out==> RGB in
Message-ID: <148@butler.UUCP>
Date: Tue, 8-Oct-85 17:50:17 EDT
Article-I.D.: butler.148
Posted: Tue Oct  8 17:50:17 1985
Date-Received: Sat, 12-Oct-85 13:21:02 EDT
Organization: Butler - Controls Div., Kirkland WA
Lines: 36

<chomp>

A while ago I posted a query to the net regarding driving the
RGB input of my pc monitor from the composite output of my VCR.

There were a few requests to summarize the results to the net.
Follows is the only response I got.

>What you need is a subset of any color TV, since broadcasts
>are composite and ALL color CRTs are RGB.
>You need a little box containing a chroma demodulator IC
>and a "matrix" of resistors (usually part of the IC these
>days) and a DC power source for it.  You'd think by now
>somebody would sell such a beast.  Look for it;
>you'll get a hell of a picture!  mike k

I asked an analog hack what the previous meant and then did
some looking around... couldn't find a chip that had the matrix
onboard but there are plenty of chroma demodulators.  Unfortunately
it doesn't look like it is quite as easy as wiring up a digital
clock (my only ever piece of hardware experience).


Anyway, does anyone out there in net land have any further 
comments on this?  Is there such a box ready made?  How about
even a schematic?  Some of the app notes associated with the
chips I looked at seemed to indicate that just the chip and 
a DC supply wouldn't quite be adequate to do the job. Any 
ideas?


                                    thanks in advance...

    ... uw-beaver!{tikal, teltone}               david m chinn
	   !{tikal,teltone}                      box 2249
	       !dataio!butler!chinn     	 kirkland, wash 98083