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HMD, Can I use this? Answered

Hi all, I have a view finder from a camcorder of an unknown make. It has four wires 1 white and 3 grey. I was wondering if anyone had a way to test and find out which wire was which.  I dont have a oscilloscope
but any other ways are welcome. Thanks in advance for your time and effort.

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orksecurity
orksecurity

Best Answer 11 years ago

I would guess that two of the wires are power and two are signal -- or perhaps one is power, one is signal, one is common ground, and the other may be either negative power or another component of signal or something of that sort.

Finding that out (and finding out what kind of power it needs, and whether you would have to preprocess the signal) is probably best approached by contacting the manufacturer of the component and asking them. If you can't figure out who they are, contact the manufacturer of the camera and ask them whether repair information is available for that model; that might contain circuit diagrams, at least at the module level, which would give you the pinouts.

If they can't help you, there are sites on the web which have copies of the maintenance manuals for some pieces of equipment, either viewable on line or for sale; that might be worth trying.

If you want to figure it out  yourself ... it would be a lot easier to look at what the camera is putting out on each pin; otherwise you need to trace through the circuitry and figure out what's connected to what, and workd backward from that to what they're doing with that wire. If youre are lucky, there may be printed or etched markings on the circuit board which say things like "Vcc" or "V+" (either of which would be a power input), which would help answer this question.

But unless you find the markings or a manual, I don't know any way that someone who doesn't have fairly deep electronic knowledge is going to reliably figure this out. If I had it in my hands I might be able to offer a bit more advice, but the photos don't have enough resolution and I'd be nervous about trying to do it remotely in any case.

Interesting project. Certainly worth trying... though that looks like it would be easier to turn into a monocular-like viewer than a HUD; it seems a bit bulky for head-mounting unless you're doing to things with mirrors/prisms to mount it alongside the head. If you make it work, let us know how it works out.

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Modarius
Modarius

11 years ago

Ok, I found that the white wire is +5v, at least it lights up with that. It also lights up immediately, there is no "warm up" time needed. The next step would be to find an S video source. I ultimately plan on hooking this up to a small camera that I have and doing something like night vision :D.

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Re-design
Re-design

11 years ago

Did you have any luck? <br /><br />I found another <a href="https://www.instructables.com/id/Googfan_s-Mini-TV/">link</a>.<br />

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Re-design
Re-design

11 years ago

<a href="http://www.youtube.com/watch?v=xS0HwHlEzRM&feature=related">Check out this link.</a><br />

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lemonie
lemonie

11 years ago

That's compact! Can you see what the signal-decoder looks like in there? Considering that two of the wires are power & "ground" you've only got one or two for signal and we're not sure what type of signal that is.

L

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Molten Boron
Molten Boron

11 years ago

DIY projector! Definitely worth it.
Imagine watching your favorite Youtube videos ON YOUR ENTIRE BEDROOM WALL!
Win.

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Modarius
Modarius

11 years ago

Whoops! Sorry I didn't mean to click the "this is the best answer button". These are all great answers and I will try some of the things sugested. Any more info would also be apreciated but this looks like all there is to know.

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Re-design
Re-design

11 years ago

That looks like one of the old view finders that used a cathode ray tube.  Be very careful if you try to power that up.  It would use several thousand volts.  It might tingle a little if you touch the wrong thing.

Are these 4 wires the only wires that connected it to the camera?

If so then I would assume that 2 wires were for power and 2 wires were for the signal.  I have not idea which is which but you might be able to figure out by looking at the circuit board.  And folowing them to see where they lead.