Dave Mullenix wrote:
>
>>> > What's about a light source (light-bulb connected to AC) and some
>>> > solar-cells ?  :-)
>>
>>Now for my own wacky idea: microwaves!  Use old uwave oven magnetron,
>>transmit down waveguide (or between parabolic reflectors for that
>>megavolt isolation), receive in 1/4 wave antenna and rectify using a
>>swag of hot carrier diodes.
>>
>>Back to reality, another way of obtaining galvanically isolated supply
>>is with piezoelectric 'transformers'.
>
>Let's not forget the dynamotor: an ac motor driving a DC generator.  For
>extra isolation, use a rubber belt to connect the two.
>
>And has anybody tried an AC fan driving a windmill connected to a DC
>generator?
>
>Or an AC powered Gerbil running in a wheel connected to a DC motor?

Anybody know the dielectric constant for a gerbil? ;-)