Half Inch CRT Monitror

I was tearing apart an old VHS camera and decided to rip the LCD out of the viewfinder. Much to my suprise I find a CRT monitor not a LCD! This screen is about 1/2 inch. It has a 5 pin connector that leads to the motherboard and a chip on the bottom that says A118121. Obviously two of the conections would be V+ and ground, but what about the other three? I would like to turn this into a composite or VGA compatible screen (maybe even a crazy tiny oscilloscope) but I need some help. Any suggestions or leads would be greatly appreciated.

Picture of Half Inch CRT Monitror
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SixTeenBitDisk11 months ago

I just took apart a old and broken VHS-C camcorder and saw a LGR video on a half inch CRT and thought it would be a cool progect I just need help on some of these pins.

4RESTER5 years ago
On my View Finder piouts is:
Brown = Unknown
Red = GND
Orange = Composite Video Inp
Yellow = +5V (not +12V !)
4RESTER5 years ago
Pinouts for Your View Finder is overhere: http://www.insideelectronics.co.uk/camcorder-viewfinder-crt/
4RESTER5 years ago
4RESTER5 years ago
I have a very similar View-Finder, on the board is IC A118121, connector is 4-pins: Brown, Red, Orange, Yellow. Pinouts is unknown :-( .
gimmelotsarobots (author) 9 years ago
Thanks, but I actually figured it out before you posted this.
Any chance you can share your findings on what wires go where for that 5-pin connector?
gimmelotsarobots (author)  Mandrax8 years ago
yes. I'll need to find where I wrote it down and then I'll let you know. I was able to add an external composite video input too. It turns out these things receive a composite video input from the camera.
Can you tell us?
It's all good now, I figured it out by trial and error. I don't know why I didn't look into these little viewfinders earlier!
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