... Those capacitors are low pass filter components to reduce the high frequency noise. 10 nf in parallel with 220 nF would work just about the same way as...
Hi all! This is not mag-related, but I'm sure someone has a hint for me. I'm searching for a solution for a wheatstone bridge, which has one "open" part (where...
Maybe my Q was not as stupid as I thought. One could switch sensitivity if you have wide ranges of bridge imbalance... Off to bed now :-) Good night, Hannes. ...
... Hannes, I'm assuming that with a bridge, your sensor is resistive. Here's a little trick that might help you and you can use it in other interesting...
Robert (Rob) Wells wrote: [...] ... Hi Rob, thanks for your reply and your hints! Meanwhile I dropped my new project. I decided it's not worth the hassle to...
I'm an amateur, new to the group and working with the sas.org torsion magnetometer design (a nulled-out, rare earth magnet hanging from a thread inside a CD...
Hi Tom: In the demo you didn't say what the scale factor was. How far from the mirror to the spot would change the data into angle. Using Hemholtz coil or...
Hi, Brooke, The video was made just by shining the laser on the wall. The magnetometer is built, but I haven't yet mounted it, the laser, and the software and...
Hi Tom: I think there's enough data in the Helmholtz section of my web page to make one. http://www.prc68.com/I/Sensors.shtml#Helmholtz The nice thing about...
Last night I did my first lengthy data collection on my five dollar homemade torsion magnetometer. The results (and free downloadable software I wrote for...
HEy Tom, I'm just tuning into this topic. Are you referring to the kit for $5.00 from AAVSO? If so, where did you write to to get it? If not, please clue in...
... This is very cool. If you could put it somewhere where no one is slamming doors (or whatever is making the spikes) it would be hard to tell from the...
I sat the magnetometer in the basement, hoping for a quiet spot. I tried running it first on the 2nd floor of our 90 year old house and there was far too much...
http://www.scifair.org/ has very good instructions and a parts kit, two different products. I bought the instructions and after reading them, decided that...
The link to my site that I posted originally (www.campparadox.com/magnetometer) has some pictures. And the site that sells the kit also has some great...
Hi Tom: While looking for something else I came across this magnatometer on the NASA web pages. You can adjust the damping by how you cut the 3x5 card. They...
Hi all, I am new this news group. I was working on a project that had to deal with the HMC1052. I understand that I have to do rotational calibration for the...
Hi John: The first step would be to make an X-Y plot of the two voltages for a number of points. The scale should be 0 to 3.0 volts on both axis. For just...
AKM Semiconductor has announced a cheap compass chip for GPS applications. Price is $5.24 in 25000 quantity. If somebody in the group will spring for a batch...
http://www.asu.edu/news/stories/200706/20070621_geophysicists.htm .... The sun emits a continuous flow of charged atomic particles called the solar wind. This...
Hi all, In 3D compasses since we have accelerometer to measure the tilt and 3rd axis, we do not have to worry having the compass parallel to earth to see the...
In Calif, we get about 2.5 degrees of error for every degree of tilt error. THis is due to the fact that the dip angle here is about 60 degrees. further north...
I want to take the next step after completing my simple torsion magnetometer (www.campparadox.com/magnetometer) I'm interested in monitoring the earth's...
Hi Tom: It's a 2-axis MR type sensor combined with analog circuitry and a digital interface, ready for a micro controller. Intended for rough compassing....
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