For all engineers in electronics and designers of LRL's

[Nicolas]

Hi to all

For all electronic engineers and designers LRL. can someone explain how this type of devices work. (What what techonologie and phenomenon..!!)

Watching some videos here for an example. We notice the same thing:


http://www.youtube.com/watch?v=TY6Vx3-v5F0
http://www.youtube.com/watch?v=aHEvFuKVVSQ
http://www.youtube.com/watch?v=LmqRzuGYAg4


Devices are turning to the left or to the right following the target and it is a little light, and that as Rods. but the most important how it turns when you're over the target exactly?!

They is equiped with a DC motor that rotates with the magnetic field of the earth? or with the magnetic field of the target buried or not buried?

Note: It takes one consederation that this type of device are electronic!! they are not rods. and they did change the polarity and left and right.