In college I did a field school in archaeology. We used
ordinary welding rods bent in an "L" to find features. I
didn't believe it until I saw it. Hold the short parts as
tightly as you wish in your fist with the long parts
sticking straight out ahead and parallel to each other and
the ground.

We were excavating Iroquois Indian sites. Whenever the rods
swung out we dug. They located fire pits and longhouse walls
and occasionally other things not necessarily related to the
Iroquois. Nobody could explain it.

Allen

> -----Original Message-----
> From: piclist-bounces@mit.edu [mailto:piclist-
> bounces@mit.edu] On Behalf Of Harrison Cooper
> Sent: Wednesday, May 15, 2013 10:45 AM
> To: Microcontroller discussion list - Public.
> Subject: RE: [EE] underground pipe/wire finder
>=20
> OK...first all....keep an open mind.
>=20
> In my neck of the woods we have secondary irrigation water
> for lawns, etc that's not culinary...ie...untreated.
>=20
> After building my house, I called up the water master and
> said...I need to hook up but...where is my pipe?  He came
> out, pulled out a pair of rods with a 90 bend on each end,
> held them in his hands so they stuck straight out from
him,
> parallel to the ground.  Then he started walking around in
> the general area where the pipe was and they
> crossed...yep....the rods moved by themselves and he
> said...there is your pipe.  Dug down...and sure enough it
> was.
>=20
> So figuring that was an interesting trick, made up my own
> rods and amazing...it works.  But it doesn't for everyone,
we
> did some un-scientific testing (made it my daughters
science
> fair project) and found wearing gloves inhibits it, etc.
Some
> people it simply would not work at all.  So over the past
> years I've helped neighbors find sprinkler pipes, etc
>=20
> There is a youtube video that shows this, search on
"Divining
> rod video - Find underground pipes easlily - YouTube"
>=20
> -----Original Message-----
> From: piclist-bounces@mit.edu [mailto:piclist-
> bounces@mit.edu] On Behalf Of Bob Blick
> Sent: Tuesday, May 14, 2013 10:57 PM
> To: piclist@mit.edu
> Subject: [EE] underground pipe/wire finder
>=20
> When the power company wants to follow the path of a
> buried cable, they attach a gadget to one end and walk
> along the ground with another gadget. Looks real easy when
> you have that $7000 pair of gadgets.
>=20
> Any idea what inexpensive thing I could modify to get a
> similar effect?
> I don't need to do it on a live wire, and the maximum
depth
> underground is one meter or less.
>=20
> Thanks,
> Bob
>=20
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