Edition 142 of Dan's letters are out. Lots of weird and wonderful questions (and answers) as usual.
Would it be possible to easily use the third wire (the one that's used by the tachometer) of a 3-wire fan connector to power an LED strobe? I mean a strobe like you (at least in the dark ages) used to set the timing on an automobile, not like the kind photographers use.

Such a thing might be a hit with the people who trick out the insides of their computers with lights and windows and the like; it would look pretty cool to have a fan seemingly not rotating.
[The article]