Hi: I'm trying to learn more about Fluxgate Magnetometers and am looking for engineering reference type books. Does anyone have any for sale or can recommend?...
... I've never seen one. I'd be interested, too. Go to a university or college library with a subcription to the IEEE library through INSPEC. Do a search for...
Find Burke's "*Handbook* of *Magnetic* *Phenomena*". It explains the different types of magnetometers in very simple terms. I used it for a reference to...
Hi Bill: The first reference (Chapter 48 of the Sensors Handbook) has a very general overview of the Fluxgate, but is lacking on details. I have already read...
Hi: In order to get a feel for fluxgate sensors I home made one based on using twist & tie wire for the core, winding it with 200 turns for the drive coil,...
The material in the anit-theft devices is 2705M metglass. When I was first working on the magneto-inductive sensors this was a material I used. It is easily...
Hi Brooke! ... Pretty cool! Congratulations! :-) A few questions: What is your driving frequency ? What is your driving current ? If I understand correctly,...
Hi Hannes: Final drive frequency 200 Hz. Since the core saturation is controlled by the core material and drive coil inductance, changing the drive frequency...
Hi Brooke! Thanks for the answers! Brooke Clarke wrote: [...] ... To be honest, now I'm more unsure about the design than before ;-) Could you make a photo of...
Brooke, The thinner material is the metglass. Be really careful, this material is really sharp on the edges as it is so thin. When I pulled a couple of these...
Hi Hannes: Attached is a photo of the 3/4" dia core with the drive coil (200 turns) before it was flattened to fit into a drinking straw. Brooke ... -- w/Java...
Hi John: In the tag with all rectangular strips the two long ones are 1/2 mil thick and the shorter one is 2 mils thick. In the tag with the single piece with...
... Thanks Brooke! I've set the group to strip attachments to prevent worm-spreading. Could you please upload it to the groups-site @ yahoo or email it to me ...
Hi John: I've been looking at the IEEE Metallic Glass Core design and at the FGM-550. Can you talk about the series circuit that's between the half bridge...
Brooke, The values in the schematic for the IEEE designs is .047uF and the resistor is 470 ohms. The values are in "nF" and "K" ohms. The totem pole output...
Hi Brooke! ... Thanks for the photos! I've uploaded them to: http://photos.groups.yahoo.com/group/magnetometer/lst (folder Brooke_Clarke) Just one last...
[BCC to all lecturer of the Amateur Astronomy Conference] Posted to: RadioJove - Jupiter Radio Astronomy - Maillist @ http://radiojove.gsfc.nasa.gov/ ...
I am looking to buy a magnetometer that will be used for treasure hunting on land. Need something that will be effective on small objects, but will go very...
Hi: While reading MR patents and updating my magnetic sensor patents web page at: http://www.pacificsites.com/~brooke/FGPat.shtml came across 2828396: ...
Hi: It would be handy to have a box that would shield it's contents from the Earth's magnetic field. Only needs to be a few inches cube. Where can these be...
... Well, probably the cheapest solution is to solder some copper clad PCB boards together. Another possibility would be regular aluminium sheet boxes or...
... Copper PCB would not provide very much *magnetic* shielding. The usual fallbacks are: 1) mu-metal (not perfect, but better than copper, expensive,...
... Have you searched the web using "magnetic shield"? Basically you need build the box with something that will shunt the magnetic field lines through the box...
Magnetic Shield Corporation sells sheets of thin mu-metal to form your own zero gauss chambers. Otherwise you may find a nickel-plated water pitcher or coffee...
Hi Doug! ... Yeah, you're absolutely right. Sorry, was not reading carefully enough. Brooke, why do you need to shield your equipment from Earth's mag. field ?...
Hi Hannes: I'm experimenting with MR bridge sensors and would like a simple way to null the bridge with a shunt resistor (or maybe 2 shunt resistors). This...
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