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 ...
Mark, I have a KMZ10B sensor and the temperature compensating circuit shown in the app notes that go with the device. I think the circuit is also in the files...
I have added to my photo album, a proposed system block diagram for a linear and temperature controlled magnetometer based on the FGM-3 sensor. I have either...
Hello In the message quoted below the magnetic field value is mentioned with seven figure accuracy. What sort of instrumentation/sensor give this accuracy?...
Thank you so much! ... From: magnetometer@yahoogroups.com [mailto:magnetometer@yahoogroups.com]On Behalf Of John Wilcoxen Sent: Monday, January 15, 2007 12:58...
Hi all! Since more and more IC's, especially Opamps are not produced in DIL packages anymore, but instead in SOIC packages, I decided to make some adapter PCB ...
Hannes, This is a good idea, but I would like to make one suggestion. Instead of laying it out as you did, put the op-amp on the bottom side and twist so the...
Hi Charles! ... Thank you for the suggestion! Actually I was pondering over the layout almost over the whole day. Tried several versions, but to reduce cost I...
Hi Hannes: It seems you have way more vias than needed, like all of them. Why not single sided? Any idea of where to get the SIP type pins used on Surfboards? ...
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