[sdiy] tiny oscilloscope from camcorder CRT viewfinder

[anthony]

That's what I figured. Mine is about 1.5cm, but I got it from a unit that 
had been used by the ocean and got salt spray inside it, so I never had the 
chance to power it up to figure out where the non-color-coded and unlabled 
wires should be connected. It looks like it has it's own little circuit to 
make the HV and everything, but I have yet to get even a squeal from it...

I'd like to start hunting for old broken camcorders in 2nd hand stores and 
flea markets and what-not. Our local Goodwill has either an idiot who prices 
their electronic junk way too high, or he's a guy like me waiting to buy the 
stuff for himself.


> The ones I have are all just little monochrome monitors - just like their
> larger counterparts. I have one with a 1cm tube, and I've had that working
> directly from the output of other video equipment. As such it expects a
> composite video signal.
> As for conversion, I'd suggest the old article has it exactly right.
>
> Ken
>
>>I have a tiny little B&W CRT-based viewfinder from an older, but not 
>>ancient
>>8mm camcorder.
>>
>>I thought it might be cool to put it as an oscilloscope which could fit in 
>>a
>>regular synth-module sized enclosure.
>>
>>I've read about old article making a scope out of a TV, but I don't think
>>that'd apply here so much.
>>
>>I thought maybe some circuits to process the signal and to drive the 
>>coils.
>>
>>I can't tell if this thing takes NTSC composite video or if the small
>>circuit board is just a raster-scanner or whatever it's called.
>>
>>Anyone ever seen anything like this?
>>
>>
>>aa
>>
>>
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> _______________________________________________________________________
> Ken Stone   sasami at hotkey.net.au
> Modular Synth PCBs for sale <http://www.cgs.synth.net/>
> Australian Miniature Horses & Ponies <http://www.blaze.net.au/~sasami/>
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