9 Feb
2006
9 Feb
'06
12:49 p.m.
Hi,
Barry Watzman said:
Wrong. Blue (and White) LEDs are a relatively recent invention. I'm not
sure when they first came into existence, but it was WAY after 1991; it was
closer to or even after 2000, although it might have been in the very late
1990's. White LEDs were even later. There were 3 color LEDs in 1991, but
not RGB.
I have blue LEDs listed in a 1995 catalog. They're not even very expensive,
74 pence each, say about $1.25, so they must have been around for a while
before that.
--
Cheers,
Stan Barr stanb at dial.pipex.com
The future was never like this!