> I had seen a few things in the archives about using a
> video cameras vewfinder as a HMD. There might be more
> but I don't feel like looking. I just have a few
Oops, wrong thing to say around this crowd. Use the search capabilities
and it'll be easier, but definitely look. I had to look...
Hopefully these answers will help narrow your search, though.
> questions about this. I might consider using a cameras
> vewfinder due to cost. I had taken out the view finder
> from an old school VHS cam that rests on the shoulder.
> I don't remember how many wires it had. I am wondering
> what each of the wires are for and how do I find out
> what wire is what? I know the pos and neg wires are
It varies tremendously by maker and model, unfortunately. But, there are
3 common answers.
1. Separate RGB inputs. This one is hard to manage, because most of our
"sources" don't provide RGB data. VGA can provide this, though, and
there are breakout cables that do just this. You'll also have to handle
the sync signal, which may be a different wire, or composited onto the
green signal.
2. Video connection.
3. NTSC composite TV signal.
Another possibility is that it uses something entirely different, and
possibly even proprietary. LCD interfaces can even be digital,
sometimes, though they're usually not.
> red and black respecively. How do I find out what
> voltage to use? Is it possible to leech power off the
Do you have a working camera? If so, it's not too bad to trace what
signals are coming into the viewfinder. If, like me, you have only the
viewfinder...it becomes much harder. For reference, I don't have one
working yet.
> go about adjusting the display to get best view? Also
> how the hell would I hook it all up once I determined
> what does what? I presume its just a matter of hooking
Assuming you have a nice plug (10 pin is a relatively standard connector)
all you need is the mating connector, and to make the right connections
on the back of it. You're going to end up making your own cables,
anyway...even a standard VGA cable is pretty big in the world of
wearables. Local TV repairmen are good sources for surplus items like
this...for wiring diagrams, too, if you know the make and model of the
camera it came from.
-- Chuck Knight
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