All Questions
Tagged with calibration compass
5 questions
4
votes
2
answers
92
views
How to calibrate a compass module that isn't producing elliptical data?
My company is working on something similar to (but not the same as, but it's just easier to explain it like this) an electronic prize wheel, mounted horizontally.
The method of detecting which prize ...
- 41
0
votes
1
answer
230
views
Do factory calibrated electronic compasses need to be re-calibrated in the field?
I have been working on an electronic compass. It has become apparent the best way to calibrate the magnetometer is once out in the open with out any large metal object nearby.
Curiously, what I have ...
- 3,549
5
votes
4
answers
2k
views
How is the degaussing feature in the HMC5883L 3-Axis Digital Compass chip correctly used?
edit/tl;dr: The set/reset strap driver is an H-bridge circuit to deliver 10 mA of DC current to a strap which temporarily produces about a 1.1 gauss magnetic field offset. A change in the measurement ...
- 3,489
12
votes
2
answers
3k
views
Why do compass chips in cellphones require frequent calibration?
Most cell phones offer digital compass functionality which uses a 3-axis magnetometer chip for data. Phones (some more than others?) frequently require the user to "recalibrate", which ...
- 3,489
19
votes
1
answer
10k
views
Magnetometer ∞ shaped calibration
In mobile phones and other devices using a 3-axis electronic compass, a ∞/8/S shaped movement is used to calibrate the magnetometer as shown in these videos.
Why is this movement performed, what is ...
- 739