... You don't give much detail of what you are trying to determine or what type of magnetometer you are using. If you are looking for local magnetic field...
... (snip) After a week of testing, it was still clear that the thermal signal (or something related to temperature, like relative humidity) was as large as...
hi sorry for the long delay. what i meant by my second statement is that i am measuring the magnetic field on my campus and i am using the line method to take...
I have looked all over on the net but can not seem to find any clear answer to what I seek. Question is about GM Tubes or in this case the pancake style of GM ...
... Did you check Wikipedia? http://en.wikipedia.org/wiki/Geiger-Mueller_tube Several patents are listed and they should be interesting. ... -- Gerald...
... Based on comparisons with the boulder data and from the even nearer Fredricksburg VA site: http://geomag.usgs.gov/observatories/fredericksburg/ (which went...
... Success! Yesterday, I unsoldered the 3 LM358 dual opamps, soldered in sockets, and plugged in 3 LT1013 opamps and went through the whole circuit with a...
Hi John How do you locate your magnetometer away from cars or other moving metal objects? I found that my system had to be hundreds of feet away from cars to...
... I have the magnetometer set up about 100 feet from the driveway. I pick up a recognizable blip each week, when the garbage truck goes by, but cars produce...
I finally got a whole day of data (without a power failure) at Waynesboro VA, to compare to Fredericksburg VA observatory data, (which is back on line, again)....
I have uploaded to my file folder an image of the data I collected during the flare event of December 14 using a FGM-3 magnetometer in a phase locked and...
... Hi John! Very cool! Congratulations! Thanks for sharing! Your data is in very good agreement with Fredricksburg. Once my current projects are finished, I...
... Thank you. My location is about 100 miles south west of that observatory. But my data shows up within a minute of real time, while theirs takes about an...
I posted my record of the 12/14/06 magnetic event in the files section. The Texas recording pretty much looks like every one elses which is to be expected, I...
Hi, i am trying to build a fluxgate magnetometer but i have a major problem; the LM-358 Op-Amp i use give variation output with change of temperature. Does...
Thank you John! i find the major source of the problem when i warm the LM358, but i suspect other parts too. I have built a simple temperature compensation ...
... Very well, but my last point was that if the circuit involves any fast edges, it may be the insufficient speed of the LM358 that is the cause of the...
Hello I wish all the members of the group a very happy new year. I also thank the memebers who have responded to my queries regarding making a magnetometer for...
... input ... be ... The HMC1001 is a 850 ohm wheatstone bridge, so each leg should be 850 ohms, not anything else. If you get opens or shorts, check your ...
Hello Thank you very much Mr Mark Amundson. Today I will check the connections as you have suggested. This is the simplest connection to check. I am a...
Thanks Mr Marks for clearification.Do you have some tips / suggestions other than "application notes" for "vehicle detection and classification" application of...
The App Note AN218 is pretty thorough on the subject of vehicle detection using magnetic sensors. The biggest challenge is to acknowledge the local ferrous...
Hello, I just recently joined the yahoo magnetometer group to learn more about how I can get kids involved in electronics, physics , and astronomy. I...
Hi Jim: I have a web page devoted to some sensors that I find interesting, see: http://www.pacificsites.com/~brooke/sensors.shtml Have Fun, Brooke Clarke ...
Hi, I´m trying to build a position system in a room. I´m thinking in tree coils as transmitters and tree smallest ones as receivers. The transmitters have to...
I just recently joined this group, so a big hello and happy new year to you all! I'm working on a home project to use a magnetoresistive sensor to detect a ...
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