The Best so far ?

[Eugene52]

This is maybe the best so-far , in the do-it-yourself "Proton-magnetometer" Department !!
Check this file I posted here !!! Got this file today from a public-website , the link was sent to me from a great Thunting.com Member Cornelius.

Regards...................Eugene52

[Fred]

Hi Eugene, great article, thanks.

If , when looking around the net, you find info (like datasheet or application note) about the Develco model 9100A 2-axis fluxgate mangnetometer,please let me know.
I have been searching a lot but could not find anything, about 2 years ago i was able to find the 9200c datasheet, wich was usefull too, but now i can´t even find that one.
regards,
Fred.

[Eugene52]

The Best so far ?

Hi Eugene, great article, thanks.

If , when looking around the net, you find info (like datasheet or application note) about the Develco model 9100A 2-axis fluxgate mangnetometer,please let me know.
I have been searching a lot but could not find anything, about 2 years ago i was able to find the 9200c datasheet, wich was usefull too, but now i can´t even find that one.
regards,
Fred.

Hello again Fred , Glad you are doing OK .
You are right nothing came up , but when I typed Develco , Mountain View , CA. A ton of stuff came up , but so far no schematics . Just some block diagrams . At one time in the 1970's they were a very successful Group of R & D Electronic Design Engineers a real "Think Tank" , kinda like us here at Geotech ......They had some huge contracts , including magnetometers for NASA and some big contracts for Boring Measurement Equipment. I will keep searching today . It seems like Vector and Squid Magnetometers were their specialty at one time . Maybe someone who knows more , will see this posting !! I downloaded one excellent PDF folder so far but it is 6.3 megabytes , I can e-mail it to you if you like. I posted page 35 , which is one of their contraptions !!........Regards.....Eugene52

[Fred]

Hi Eugene,
Many thanks!, you´re always ready to help ...

Actually there is "develco, Sunnyvale, CA" written on it.

I have two of those units, "2-axis fluxgate magnetometers"
there are not heavy and if i can find how to connect them i want to try them for a flight stabilisation system.
Head tracking also could be a possibility.

Do you think the PDF you got is helpfull for applications purposes?

Regards,
Fred.

[Eugene52]

The Best so far ?

Hi Eugene,
Many thanks!, you´re always ready to help ...

Actually there is "develco, Sunnyvale, CA" written on it.

I have two of those units, "2-axis fluxgate magnetometers"
there are not heavy and if i can find how to connect them i want to try them for a flight stabilisation system.
Head tracking also could be a possibility.

Do you think the PDF you got is helpfull for applications purposes?

Regards,
Fred.

Sunnyvale , Ca is correct also , the pdf I have may not help you but the next one I am waiting for might be the best one yet !! I am interested in Magnetometers for gold prospection that is why I posted here on this subject . All I hear is how LRL does not work , Correct me if I am wrong , but I have read over the years that certain types of magnetometers can pick up the differences "Deep in the Ground" between Gold deposits and Dirt !!

I have one e-mail coming today , from a "super" Geotech Member , this file may help us both !! We need to start our own Private Metal Detector "Think-Tank" . A private company that designs and patents Ideas . I am definitely going to work for myself again and over the years I have always been involved in Contracting . And now again , I am thinking of every possibility and its definitely related to Gold Prospecting or related devices to make the job easier !!..... I thought the government had free "Patent Paperwork packages" no-charge , but everytime I search someone or a lawyer wants Money or a flat-fee !!......Anyway back to the topic , I will post more later and Fred if there is a device that can detect Gold anomalies or differences at a comfortable depth , maximum depth would be done by a Back-Hoe . I have some locations in mind to test ...................Thanks again everyone for your help ........Eugene

[Willy Bayot]

This is maybe the best so-far , in the do-it-yourself "Proton-magnetometer" Department !!
Check this file I posted here !!! Got this file today from a public-website , the link was sent to me from a great Thunting.com Member Cornelius.

Regards...................Eugene52

This is paper summarizing the thesis work of a student from Sri-Lanka under the supervision of his professor. As you can see in the reference list, the paper honestly cites his sources, among which some publishing of the progresses of my PPM project dated in 2005. This was still a very early status.
At that time, three main difficulties were still to be solved:
1. Use of a proton-rich fluid with a faster polarization cycle to get a higher reading rate.
2. Here, they chose to keep the relay circuit for the polarization switching but my paper was already describing a tested fully static circuit based on power HEXFET'x. Relay contacts wear very fast with the switchoff sparks
3. The period counting based on zero crossing is simple to implement but a single spike in the signal changes the reading by about 24nT. This is unbearable.
The system is now in the status described here:
http://www.ppm-markii.net/index.htm
It has solved all of those difficulties. It is able to keep a sustained reading rate of one per second, gives an accuracy of sub-nT and uses a fully static switching circuit with short-circuit and reverse polarity protections.
It is fully integrated in a NEMA box and stores its results on an SD card.

I dare say this is the 'best-so-far'!!!

Willy

[Eugene52]

The Best so far ?

This is paper summarizing the thesis work of a student from Sri-Lanka under the supervision of his professor. As you can see in the reference list, the paper honestly cites his sources, among which some publishing of the progresses of my PPM project dated in 2005. This was still a very early status.
At that time, three main difficulties were still to be solved:
1. Use of a proton-rich fluid with a faster polarization cycle to get a higher reading rate.
2. Here, they chose to keep the relay circuit for the polarization switching but my paper was already describing a tested fully static circuit based on power HEXFET'x. Relay contacts wear very fast with the switchoff sparks
3. The period counting based on zero crossing is simple to implement but a single spike in the signal changes the reading by about 24nT. This is unbearable.
The system is now in the status described here:
http://www.ppm-markii.net/index.htm
It has solved all of those difficulties. It is able to keep a sustained reading rate of one per second, gives an accuracy of sub-nT and uses a fully static switching circuit with short-circuit and reverse polarity protections.
It is fully integrated in a NEMA box and stores its results on an SD card.

I dare say this is the 'best-so-far'!!!

Willy

Very impressive !! It will take me a few hours to finish reading the links you just posted !! Did you already post the Mark II's range and the pin-point methods of a potential target ?.............It may well be the "best so far" in the [Proton Magnetometer for sale] Category ...........Great posting Willy Bayot .............Best Regards............Eugene

[Willy Bayot]

Eugene,
Look for all the posts I made on this forum to-date, you will see that this is a long going project.
Willy

[humhum]

Hi Eugene52, Please send me HEX for PIC16F877A PPM.

[Eugene52]

The Best so far ?

Hi Eugene52, Please send me HEX for PIC16F877A PPM.

Hello humhum , I have one pdf folder that has programming on the last 2 pages for PIC16877A , it is not in HEX format . I will try to e-mail you what I have . Also I found the EPE project magazine PIC-FILE , but I do not know if it is complete ? I am trying to build a complete proton or Vector / Fluxgate Magnetometer and I am also looking for complete Project files . Anyway my email is [email protected] to exchange files.
Take Care...................Regards......Eugene

[Fred]

Hi Eugene,

Just to let you know, i have found the 9200c mag application data, not exactly the same and the connector pinout is different, but could figure it out and i looks very promising for attitude control !
Have to check it on higher altitude in real conditions
Thanks for your help,
Fred.

[Eugene52]

The Best so far ?

Hi Eugene,

Just to let you know, i have found the 9200c mag application data, not exactly the same and the connector pinout is different, but could figure it out and i looks very promising for attitude control !
Have to check it on higher altitude in real conditions
Thanks for your help,
Fred.

Thank-You Fred , I did not know altitute or pressure has an effect on magnetometer readings . I guess you are correct , I would think Proton Magnetometer would be more sensitive to changes than a Fluxgate magnetometer . Deep underwater use may have big pressure changes and would definitely need corrections . Thank-You for posting ..........Best Regards.......Eugene52

[Fred]

Thank-You Fred , I did not know altitute or pressure has an effect on magnetometer readings . I guess you are correct , I would think Proton Magnetometer would be more sensitive to changes than a Fluxgate magnetometer . Deep underwater use may have big pressure changes and would definitely need corrections . Thank-You for posting ..........Best Regards.......Eugene52

Hi Eugene,
I don´t think they have much effect,(they should not), but i must check it.
I may be just reading local field. But they look quite sensitive, and they mention satellite attitude control on the app. notes.

[crossv]

Develco 9200C-03 mag datasheet

To Fred or anyone else, I am interested in model 9200 3-axis mag connector pinout and other datasheet info. I have one and can generally ascertain which pins on 9 pin connector are associated with power and which are data outputs. But I'm not sure of supply voltage and there are two lines that seem associated with power and I would like to understand better what is expected before I experiment further.