[sdiy] VCR display pinout?

[Terrence McWee]

Is it just me, or is the "VFD ring modulator" described here really a 
lot more like a spring reverb (both in the end result and its mechanics) 
than a traditional ring modulator?

T.Mc

On Tuesday, September 24, 2002, at 10:46  PM, Matthew Valdes wrote:

> Haven't built it myself, but it gets the wheels turning.
>
> http://www.angelfire.com/electronic/epeasant/projects/ringmod/trmod.html
>
> Have fun!
> Matt
>
>
>> From: "med" <teenagewasteland at prodigy.net>
>> To: "diydom" <synth-diy at dropmix.xs4all.nl>
>> Subject: [sdiy] VCR display pinout?
>> Date: Tue, 24 Sep 2002 20:14:22 -0500
>>
>> Okay, moderately off-topic. But if I can figure this out it might
>> *eventually* have some form of synth application. Maybe blinkenlights
>> as one plays :)
>> I have two or so VCRs sittin' around gathering dust, and so i opened
>> one up. It's mainly a bust (cept for the power supply, which I'm just
>> barely too-squeamish-to-try) but there's a few things of moderate
>> value in there. There's one of those old-school (like mid-80s) display
>> screens, which appears to be made of many many tiny little LEDs. From
>> what I can see (still haven't fully unsoldered it -- it's 32-ish pins,
>> spaced two on the left -thirty-odd - two on the right) it's marked
>> "P/N 1AV4T41B00900" and has a logo that appears to say Futaba. I
>> opened up the other one just enough to be able to see the pins for its
>> screen (which looks darned near *identical*, 'cept different pins
>> connect all the way through) and stuck a scope on it. At first it
>> looked like a sine wave with many varied "things" happening to it,
>> like marching ants. Then, (taking the ground from the case of the VCR)
>> it settled down into what looked almost like a pulse train. So my
>> question is, how on earth *do* you drive these? Is it more trouble
>> than it's worth?
>
>
>
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