cctalk Digest, Vol 11, Issue 47

From: CRC <technobug_at_comcast.net>
Date: Sun Jul 25 19:25:10 2004

On 24 Jul 2004 at 21:35:53 "David V. Corbin" <dvcorbin_at_optonline.net>
wrote:
> On the topic of unusual devices, does anyone have and spare SED [sound
> emiting diode] or DED [dark emitting diode]. There were both
> advertised in
> EDN Magazine a long time ago [mid 1980's if I recall, note sure of the
> exact
> year, but it was probably sometime around April...]
>
> Cant seem to find any current manufacturers....
>
> David.

A while back when the semiconductor industry wasn't so tight-assed,
National Semiconductor used to throw gotchas in their adds; one being
the DED. They even published a data sheets for their various putons
(which I have tucked away somewhere - if I locate them, I'll put them
on line). I remember their comment that from the same production line
they were able to establish a 100% yield of LEDs and DEDs... DEDs were
available for purchase along with WOMs (write only memories) - and
there were takers ;D

        CRC
Received on Sun Jul 25 2004 - 19:25:10 BST