Oct. 9, 1962: First Visible LED Is Demonstrated | This Day In Tech | Wired.com
Robert E. Seastrom
rs at seastrom.com
Tue Oct 9 14:42:06 CDT 2012
"Karl W4KRL" <W4KRL at arrl.net> writes:
> It is unusual to consider that it took half a century to go from the red LED
> to a practical replacement of the incandescent bulb. Think of how much
> faster other inventions developed like the airplane or personal computer.
First manned flight [*]: 1783
Elapsed time: 153 years
Hollerith Tabulator [**]: 1889
TRS-80 Model III: 1980
Elapsed time: 91 years
[*] Hot air balloon - Daedalus and Icarus missed the mark.
[**] Babbage difference engine doesn't count; it was a paper design...
LED technology development looks pretty good in that context.
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