On Apr 26, 2:33 pm, grumpyoldhori wrote:
Could I have some advice please.
I need to get a twelve volt, 1/2 amp supply five
hundred metres up a hill.
I do have a fence a metre high made from wooden posts and
seven runs of Num eight (4 mil) galvanised steel
wire.
Is it feasible to use two of these wires to carry twelve
volts that distance ?
Thank you.

Yes. But there will not be enough current available to run whatever
the thing is you want. A crude method is to bump up the bottom end
volts, then stick a constant current regulator at the top to float
charge a small battery (NICAD/SLA whatever?)- you might get only a few
milliamps, but should do it, assuming load is not constant. Google on
LM317 applications for a circuit....and stick a fuse at the bottom
lest a cow drop a short on the wires...

Naturally, as in all things technical, there will be incredibly
complicated alternatives involving heaps of planning, research, work,
and expense....

Andrew VK3BFA.


Andrew VK3BFA.