[sdiy-interim] first commercial video module?

[Magnus Danielson]

From: "Paul Perry" <pfperry at melbpc.org.au>
Subject: Re: [sdiy-interim] first commercial video module?
Date: Wed, 28 Mar 2007 10:03:21 +1000
Message-ID: <004501c770cc$81bc7780$5401a8c0 at frostwave>

Hi Paul,

> Back in the Good Old Days, one converted a TV to a crap
> oscilloscope thusly:
> 
> Take a line out from the horizonal scan.
> Take a line out from the vertical scan.
> 
> Now do a bit of analog comparator work, generating a
> signal that is on only when the horiz voltage is equal to X
> AND the vertical is equal to Y.
> And use that output to modulate the beam.
> 
> Well, at least it's as analog as hell........

Bzzzt! :)

Now they are denying us the 25 kV too!

There is nothing like knocking the CRT when the computer is slow... :)

A friend of mine actually bought a Heath Kit EC-1 analog computer on Saterday.

Cheers,
Magnus

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