9 Feb
2006
9 Feb
'06
12:49 p.m.
Barry Watzman wrote:
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
Blue LEDs are listed as 2 pounds each in my 1994 Maplin catalogue, FWIW (but
no sign of white ones then)
cheers
Jules