On Jun 1, 2:48*pm, JIMMIE wrote:
On Jun 1, 11:21*am, "Clint Alexander" wrote:



I want to make a simple transmitter to use as a locator beacon. But the
source would be in the ground (anywhere between 3 - 10ft). The receiver
would need to locate it, much like a metal detector would except it would be
a small hand-held "wand" with a LCD giving the direction and signal
strength.

I'm not sure of the signaling to use therefore I'm not sure of the antenna
required. But, it would need it to follow part 15 of the FCC
rules/regulations (none hazardous and allows required interference).

I am completely new at this sort of technology. I have created circuits
before using L555 timer, 4046Phase Loop, etc. But I've never went farther
than building simple demonstration circuits. I wondered if there was anyone
on this list that may be able to shed some light on what I would need and/or
how I would use them (a schematical description), or even point me to the
"yellow brick road".

Thanks!
--
//Clint Alexander

Your friend the 555 may be just what you need. I will oscillate up to
around half a megacycle and have harmonics from DC to daylight.

Jimmie

On the other hand an EM antenna may not best suit your job. I would
suggest feeding a buried coil and let this be half of a transformer
coupled to your receiver.

Jimmie