ok!
this is interesting.
i was playing around and got idea "lets hook rock to multimeter "
after a while i noticed "spikes" of mV range 5-100.
ok... i decided to charge 1 uF 50V cap, and it did!!
i got 0.020 volt hehe. here is video.

http://www.youtube.com/watch?v=KmcizOis9ns

it its funny, i try to put in series and i got from 3 180uF 35V cap and 3 small rocks 0.070 volts.
il try tomorrow 10 or more in series.

note that not all rocks works.

here is another video.
http://www.youtube.com/watch?v=lgyK1vl7_30

2 in series, 180uF capacitors with rocks, 0.060 volts. tomorrow il do more tests.

Quote from: hemancro on November 23, 2010, 07:56:02 AM
here is another video.
http://www.youtube.com/watch?v=lgyK1vl7_30

2 in series, 180uF capacitors with rocks, 0.060 volts. tomorrow il do more tests.

interesting stuff... with a garage full of rocks you could power a small calculator hehe... jokes aside, looks interesting... let us know the results of tomorrows test

Pete

I've seen this before a while back. I picked up a rock from my drive way and at certain spots it would give me voltage and some spots would switch polarity.

I think i got more power out of it when i add aluminum foil and salt or something can't really remember it because it was long time ago.

But heres a video of it

http://www.youtube.com/watch?v=gY18yt0ZzM8

I think i conclude it was a simple water battery, but what i couldn't figure out was that for it to be a water battery it needed a dielectric and it didn't have one.

yeah i have noticed that it change polarity.
if its water battery how it gives power when rock is dry?
tnx for the video, il check it out in the morning.