[sdiy] XR2206 and the new component I'm patenting.

[Rude 66]

Batz,

 i know nothing about the 2206, but your LED-adventure was a delight to read
with this morning's first cuppa coffee. ;-)

r./



----- Original Message -----
From: "Batz Goodfortune" <batzmanx at all-electric.com>
To: "synth diy" <synth-diy at dropmix.xs4all.nl>
Sent: Wednesday, March 10, 2004 7:14 AM
Subject: [sdiy] XR2206 and the new component I'm patenting.


> Y-ellow All.
>          OK. This XR2206 thing is killing me. What the hell is the control
> voltage supposed to be? Have you seen that graph of "R" vs output
> frequency? What the hell is that? It looks like it shoots up 3 and a half
> decades at about 90K. More details on that story later. But first.
>
> Apparently I've invented a new component which should be patented. So get
> your investment dollars handy. Not content with inventing the light
> emitting resistor, I've now developed the fire emitting diode. There are
> just too many applications for such a component so I'll explain the
> procedure so you can all try this at home.
>
> Take one very expensive 10 candela white LED. Forget the fact that you've
> got the PSU set across the + and - sides so that it's double the voltage
> you're reading on the meter. Set it to 3 volts. Put LED on test and marvel
> at how blindingly bright it is. Then marvel at how dark it gets suddenly.
> Then marvel at the orange glow inside the clear plastic lens. Now look
very
> closely under a magnifying glass as a small sheet of flame shoots out the
> hole where one of the legs goes in.
>
> Then as the embers of what once use to be silicon and phosphors die out
> like a dead camp fire, marvel at the pain in your fingers where the flame
> took a spot of skin off and the legs have melted themselves into them so
> you couldn't drop the thing if you wanted to. And you probably won't want
> to such is the marvel of the fire emitting diode.
>
> And just when you think this is a use-once component, I managed to get the
> embers glowing again a few minutes later when I still couldn't believe
what
> happened the first time.
>
> Unfortunately, I don't have a digital camera which can focus that close on
> the remarkable charred remains. Nor did I have a video running. But I
> thought I'd share that with you in case such a device might be useful to
> you before the planned marketing date.
>
> Alternative names are; the fire effect diode or the semiconductor igniter
> with 5 second pre-warning indicator. Or quite possibly the silicon
> uncontrolled rectifier.
>
> I'm figuring it's something to do with the phosphors they use in these
> things that they should do this. Working something like a florescent lamp,
> they use the phosphors to turn a blue or UV LED white. Or white/blue/ish.
> So I'm guessing that what ever they used in there, when the thing gets too
> hot, it likes to burn. And I guess it released the pressure at the weakest
> point, which happened to be one of the holes where the legs go into the
> plastic. Someone might have other ideas and this might have been a freak
> event. But it's something to be mindful of perhaps.
>
> Now back to the main story.
> The problem with the frequency on the XR2206 is that I've rigged it up to
> use one of those vernier knobs like they used on the EMS VCS3s. I went to
a
> lot of trouble to set this up and the front panel should not be modified
> further. The problem with this thing is that it only has a 180 degree
> rotation. As opposed to (whatever it is?) 270 degrees? of the pot's
travel.
> The only pot I've got that will actually fit in the space is 5 meg. So
> given the nulling out of the travel and a couple of trim pots, I should
> still get a useful range out of it.
>
> I do have one other pot small enough with the right shaft but it's only
> 20K. I've seen a few circuits where they've used Voltage to current
> converters. VC current sinks. Not a problem to conjure up but a pain in
the
> ass to set up like this.
>
> I seem to recall reading where the control "voltage" is in a range of
about
> 3 volts on these suckers. From where to where I'm not sure off hand. But
> for a start, what I REALLY need to know is what they're trying to tell me
> in that graph. "R" vs Frequency. And is the frequency High then the
> resistor pulls toward negative or is it going low? (As I'd hope)
>
> This is just a test oscillator. This is not something that has to be
> temperature compensated and 1v/oct or anything. I'm hoping not to get into
> the "Over-kill" business here. And what's with using a current sink?
>
> Anyway, if someone has an intimate relationship with a 2206, I'd be most
> grateful.
>
> Thanks in advance.
>
> Be absolutely Icebox.
>
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