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Hello everyone
I am using the W2BW 3 axis hall sensor from the 2go kit and I am picking up some spurious noise on the magnetic field z Measurement. The Figures below show a measurement from a sensor when a parmanent magnet is held toward the sensor six times. As can be seen, while the x and y measurements seem to be clean, there is some spurious noise on the z component.
I thought it might be crosstalk from the I2C communication but I'm not sure.
I am setting the sensor to Master-Controlled Mode and issue an I2C read command at a frequency of 500Hz using the 1-Byte Protocol.
I set the trigger mode in the CONFIG register to 10 (e.g. ADC trigger should be after register 0x5H has been sent).
I also attached an image of the I2C waveform. On the lower graph.
Solved! Go to Solution.
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Hello
The issue seemed to be the I2C module of the uC that I was using and not the sensor. I was able to resolve the issue in the meantime.
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Hi MMductance,
I don't think the noise is caused by I2C data transmission, because data transmission will also affect the X and Y axes.
Maybe you can check whether there is a problem with the data at the input side of sensor.
Or analyze whether the noise spectrum matches the 500Hz you give.
Best Regard!
Yaran
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Hello
The issue seemed to be the I2C module of the uC that I was using and not the sensor. I was able to resolve the issue in the meantime.