I can't think of a way to use FET's for AC without steering diodes, if you
come up with one post it+ACE-

Now, IR used to make a device that was an LED in combination with a small
solar cell-like voltage generator.  Created total isolation from input to
output, PLUS automatically generated the 10 volts or so required to turn on
a FET+ACE-  As I remember, they were kind of slow, but might be OK for a light
dimmer.

I am frustrated with Triacs, they just eat up too much power and make too
much heat.   A FET could really reduce the heat sink requirements.  But with
a steering diode, how much more efficient can the combo really be?

-- LAwrence

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