convert TV/monitor to XYZ monitor

[Harry Bissell]

If you have an OLD TV with a pot for the "brightness" it might be possible
to use a vactrol or similar to control the Z axis... response time will be a
little
slow so out and out blanking might be impossible...

H^)  harry

Robert Donker wrote:

> I've done this myself many times, it's a great effect if you get it right.
> All TV's are different so I'm not sure you will find sch. What I've done is
> open up the back of the TV and identify the YOKE. This is a coil fixture
> around the end of the tube. You will easily identify the X and Y axis
> connections. These are AC connections. I usually use an old audio amp
> (should be at least 20 watts), connect the left and right channels to the X
> & Y axis inputs to the yoke. Roll off the bass and crank the treble. As far
> as the Z axis (beam modulation) is a lot trickery. Hopefully some one on the
> list can help with that part.
>
> -rpD
>
> > -----Original Message-----
> From: XinclXsynth-diy at mkv.mh.se [mailto:XinclXsynth-diy at mkv.mh.se]
> Sent: Friday, October 06, 20
>
> > 00 12:31 AM
> To: synth-diy at node12b53.a2000.nl
> Subject: OT: convert TV/monitor to XYZ monitor
>
> Leaving
>
> > semilurkng mode for awhile and I know this is kind of OT but this
>
> > is were the knowledge is.
>
> >
>
> > I've done some "oscillographics" bye running to signals from various
>
> > modules into the X and Y of my oscillocope. Synched oscillators and
>
> > ringmodulators can  do wonders.
>
> > Now I want ot expand this to a larger screen and also make it
>
> > into a XYZ
>
> > setup and my  eyes fell on a computermonitor I have left over.
>
> >
>
> > Does anyone know of any online schematics or an articel on
>
> > how to convert a
>
> > teve or monitor to a XYZ-monitor?
>
> > I have some old Elektor articles from 1978 were you  draw
>
> > oscilloscope like
>
> > curves onto a normal videomonitor but it didn't provide
>
> > X-control which is
>
> > crucial here.
>
> > The straight CV into  XYZ setup is very lowlevel approach to
>
> > draw lines
>
> > onto a CRT so maybe I heading the wrong way? Is it perhaps
>
> > better to try to
>
> > find some modules that draws these line in a normal color-tv
>
> > video signal.
>
> > It would allow for expanded mixing and interacting with other video
>
> > equipment. But that would quite possibly also include microprocessing,
>
> > framebuffering etc and I'm kind into the analogue thing right now.
>
> >
>
> http://www.AudioVisualizers.com/ has a lot of info, articles and a few
>
> suggestions on schematics but none of it is what I need right now.
>
> any hints, suggestions, books, articles? I'm all ears.
>
> //Per
>
> "The problem with todays newage music is that there's no evil in it!" - Eno.
>
> __________________________________________________________________________
>
> Per Mattsson                               Per.Mattsson at mkv.mh.se
>
> Lecturer and Computersystems manager       Phone: +46-60-148825
>
> Department of Media and Communication      GSM: +46-70-6524567
>
> Mid Sweden University, Sundsvall, Sweden   Fax:   +46-10-148934