Have you ever wondered about how the illumination in the DC plug of the DC adapter of your PowerBook or iBook works? Occasionally the cap broke once when I was trying to unplug the connector, so it revealed its internals ...

As you can see, there is a tiny board on which tiny (SMD-)LEDs are mounted. The LEDs were too small to show, but there are LED types of two diffrent colours. The light is captured by a light pipe, which is ring-shaped.

Copyright (C) 2004 [MICHAEL C JAEGER].

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