Carls mag, what you must know.

[damiafix]

Hi Chris,
thanks again for your support, for your precious help. I'm sorry, I still don't know if the problem is the Pic or the Dac, or some other thing, I must to repeat again the check with most cure!
About the LCD, I can buy it, no problem, could you tell me in wich way I can use it?

All the best, Dam

[Krzysztof]

Hi damiafix.
Slowly, the micro first is to give the right signals. In the direction of the AD557, I have written about it.
Without good signal resuscitation is unfounded.
Go to the topic http://www.geotech1.com/forums/showthread.php?t=16589
Will be there to do repairs
Best regards Chris

[damiafix]

Ok Chris,
I'm going to read your reply.

Regards, Dam.

[damiafix]

As a practical matter my finished mag could not locate a large pipe that is less than 1 foot deep. I did not measure the voltage at all. I did connect an audio frequency counter to the output. As I rotated the mag it had a huge variation. The only adjustment I made was to rotate one sensor to match the other. I was then able to get the frequency to null out (less than .005hz) as I rotated the mag. Then the pipe was easy to locate from more than 4 feet away. I also have used the mag to detect graves in a grave yard. Most of these graves are very very old and I could detect the edges of the grave with no problem. So although you are right in you idea, I know what fixed my mag. So who knows... I do think the use of the mag is not 100% science. it takes some amount of art also.. I really am thinking of building another now that I have learned so much from all of you, Thanks.
fitz.

Dear Fitz,
the SCL007 in your gradiometer is in high or low sensitivity mode? You did some modified from the original project?

Best regards, D.