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RE: View Finder Issue

From: Joe Fuentes <>
Date: Wed, 3 Dec 2003 19:48:44 -0800 (PST)

Thanks, I found one that had 50% and another that had
50% and together with the ground I got an image that's
workable.

Thanks again

Joe

--- wear it <> wrote:
> I found COMPOSITE signal by ATTEMPT-MISTAKE metod
> (on my viewfinder), like
> this:
> 
> switch on power supply in camera and switch on any
> videosignal generator
> (maybe some sort (good) old computer like ZX
> Spectrum, Amiga... which have
> video out)
> 
> DO NOT connect ground wire on camera to ground of
> videosignal generator!!!
> 
> try one of wires from viewfinder (except ground or
> Vcc) to videosignal
> generator, but remember DO NOT connect ground.
> if you see some kind noise in viewfinder that wire
> what you tried to connect
> is about 50% video in.
> try all wires (except ground of Vcc).
> 
> If you see some kind noise in the viewfinder ONLY
> with one of these wires,
> that wire what you tried to connect is about 50%
> video in.
> If you see some kind squeezed picture in viewfinder,
> like normal TV or
> monitor with bad vertical/horizontal
> synchronization, that wire what you
> tried to connect is about 99% video in.
> 
> If you found one wire what is maybe video in, try
> connect ground ;-]
> 
> Sorry for my english, this is not my primary
> language ;-)
> 
> Petr Hires
> 
> 
> -----Original Message-----
> From: Joe Fuentes [mailto:]
> Sent: Monday, December 01, 2003 10:33 PM
> To: 
> Subject: RE: View Finder Issue
> 
> 
> Well the power comes right into the viewfinder
> 
> Ok the camera is a canon 520a and the battery rode
> right on the side of the view finder as well as the
> zoom in and zoom out.
> 
> So it's all in the same board, there is a power
> (red/black) line that feeds the rest of the camera
> power. I tested it all connected and the main camera
> circut board returned the numbers I provided for
> each
> wire.
> 
> I assume that the power is going directly to the CRT
> since it's on the same board.
> 
> You seem to know what these wires are, my question
> is
> what do I do to get a component video connected to
> the
> CRT. Like a yellow component plug from a VCR for
> example.
> 
> This has been a very interesting project.
> 
> Joe
> 
> --- wear it <> wrote:
> > I mean that one wire is ground, one wire is
> > composite video, one wire is
> > DATA link for date etc and finally last wire is
> CLK
> > for DATA link...
> > BUT, where is power?
> >
> > on my viewfinder from Panasonic(Philips)
> viewfinder
> > is needed +5V and +9,5V
> >
> > Petr Hires
> >
> > -----Original Message-----
> > From: Joe Fuentes [mailto:]
> > Sent: Monday, December 01, 2003 10:01 PM
> > To: 
> > Subject: View Finder Issue
> >
> >
> > > Ok I got a view finder, and after much trial and
> > error
> > > I figured this out
> > >
> > > I have 4 wires
> > >
> > > One is 100% the ground.
> > >
> > > This is when I have the meter using the black on
> > > ground.
> > >
> > > One Yellow wire which from the camcorder seems
> to
> > > input 2.01 volts.
> > >
> > > One White wire checks out at 3.93v
> > > One White wire checks out at 4.39v
> > >
> > > With just thes four wires connected to the
> orginal
> > > camcorder, I get a video display, date flashing.
> > >
> > > Now I just need to figure out how I can use this
> > CRT
> > > in my HMD project.
> > >
> > > Any idea's? I think the two white wires are
> H-sync
> > and
> > > V-sync.
> > >
> > > Just not sure.
> > >
> > > Joe Fuentes
> >
> >
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