Invention of the black LED

National used to offer the DED, the Dark Emitting Diode (anybody have a datasheet?) I think they discontinued it as yields declined.

John

Jan Panteltje wrote in news:gevkdr$338$1 @news.datemas.de:

Aren't there already UV LEDs? (black light source, get it...?)

I'm waiting for X-ray LEDs...is that even theoretically possible with low-voltage semiconductors?

--Damon

Use semiconductors to control a mechanical contraption which under vacuum attaches and yanks Scotch tape to and from a surface quickly.

Michael

snipped-for-privacy@gmail.com wrote in news: snipped-for-privacy@r36g2000prf.googlegroups.com:

Wellll...that's quite so elegantly simple as I might have hoped, but still it's kinda neat Scotch tape can do that.

--Damon

That's how flourescent lights work and why they stay so cool. They suck up darkness which generates much less heat. You can tell they are going bad when the darkness in the ends of bulbs starts to show thru.

It's nothing new, we used to have 'blacklead' pencils at school.

Ideally, it will mirror Obama and spread even more darkness onto the minds of men (for extended political shennanigans).

Is that something like the write only memory. I remember the data sheet compared the number of socket insertions to the number of pins remaining, and about 40 insertions broke all the pins.

-Bill

I knew of the WOM datasheet:

but I don't think I ever saw one for a DED.

If you did find a pdf, you'd probably have to print it on a LASAR printer. (First A = attenuation, second A = absorption)

On a sunny day (Thu, 6 Nov 2008 21:50:32 -0800 (PST)) it happened Bill B wrote in :

LOL

That's the classic Signetics WOM datasheet. It can be used to construct FINO memories.

John

On a sunny day (Fri, 07 Nov 2008 11:51:03 -0800) it happened John Larkin wrote in :

First In Never Out?

That's the WOM, which is the sound you hear when you convert a RAM to one. ;-)

Cheers! Rich

And if you draw a right-facing diode over a left-facing diode, you get the Mogen Diode.

Bob

The early versions used NED matrices. (1)

James Arthur ~~~~~~~ (1) Noise emitting diode. Programmable diode that emits a loud noise, once.

John

Still have the data sheet somewhere. I liked the 6.3VAC on two pins. Then there was the Polish op-amp. Looked at carefully, every pin was connected to every other pin. Input offset current around 200A :)

Alan

I've used a couple of these. They start out emitting light, like a normal LED. But after a short break-in period, they switch over to emitting dark instead.

I believe this device was replaced by the invisible LED, or IED. Like the DED, they start out as a normal LED. But when they switch over to dark mode, the entire LED, encapsulation and everything, becomes invisible. All that remains to be seen are the two leads.

Quite an interesting product actually. Post some technical questions and a request for some sample IEDs online and I'm sure you will get a quick response.

QST ran an article about contrapolar energy in one of their April issues back in the late 70s, maybe early 80s. Plug your soldering iron into a CPE source and the tip ices up. Lights plugged into a CPE source create a cone of darkness. The uses are endless.