Technically, it was originally made in 1957 in Bell Labs when they were working on solid state diodes. They had reverse biased one and it glowed a blue color. Unfortunately, that discovery was over looked by the Bell scientists. Afterward, it was probably developed sometime in the late 60's as an actual type of indicator lamp.
NO NO NO NO NO NO NO NO NO NO!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
$1
i think led zepplin
Alvin and the Chipmunks were originally created by Ross Bagdasarian, Sr. Their 1958 novelty album led to great success and made the Chipmunks a house hold name.
the album is called kill 'em all made in 1983
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No currently they are not made of led.
led zep 4
all pencils are made up of graphite
In 1951
graphite
No it can not get lead out of your systym whoever says that is stupid
all pencils are made up of graphite
no, graphite
no a led pencil is made of graphite
Cartographers made the maps.
There are diodes and there are diodes LED are made from arsenic doping to emit photons are never used for other purposes other then LED