Of course is scalable. Both RF and low frequency noise harvesting.
Nothing is free, but works perfect.
If you have an aerial line near your house, ended with a transformer, just
for your use,
I think you should read the medical effects a HV aerial line can produce.
Fortunately perhaps you have small load...so the magnetic field around is
small.

On Mon, Nov 23, 2015 at 10:19 AM, James Cameron <quozl@laptop.org> wrote:

> On Mon, Nov 23, 2015 at 09:22:03AM +0200, embedded systems wrote:
> > Only if will be able to collect just the 50/60Hz hum and our
> > microcontrollers will run for free.
>
> Thing is, the typical hum isn't free.  Collecting it, even with an earth
> loop, consumes power.
>
> Perhaps what you are really after is collecting it before it is
> metered.
>
> Not equitable, and not scalable.  ;-)
>
> (I've a 22 kV 50 Hz transmission line through my farm.  It is 7 m above
> ground with two conductors separated by 2 m, and 750 m in length.  My
> house is the only load.  So I guess any loss due to cattle fenching in
> parallel should be proportional to house load?)
>
> --
> James Cameron
> http://quozl.linux.org.au/
> --
> http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive
> View/change your membership options at
> http://mailman.mit.edu/mailman/listinfo/piclist
>
--=20
http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist
.