Stephen wrote:

> I think that you've forgotten that electromechanical relays themselves contain
> several components. The coil, the former, the armature, the contacts and don't
> forget the back EMF diode.

True. But you purchase "a relay" and it already has all these parts 
assembled. If you purchase "a transistor" you still apparently have to 
connect half a dozen other components to it before it will do anything 
interesting. ;-)

-- 
http://blog.orphi.me.uk/
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