Hi - I'm using a single SS49E hall sensor to detect magnetic polarities. I have a lot of electrical equipment around, so there's a fair amount of field 'fuzz' in the air, making it difficult to get a definite measurement.
To address this, I made a calibration feature for the microcontroller to run that creates a threshold based on min and max values over the course of a 30 second interval. That way all of the field fluctuation is accounted for and a positive result is only signaled when the hall sensor goes above or below the min/max ambient field values.
OK...now the actual problem: in order to trigger the field, a single alnico-2 pole end has to be placed right up against the sensor (this is for guitar pickups) to get a reading while avoiding false results from the ambient fields.
It's not ideal because I'd like to have the hall sensor in a little housing, so I really would prefer to have a few millimeters of effective distance for measuring.
Right now I'm running on 3.3v, but I found 5v didn't make too much difference apart from the ambient field min/max shifting higher.
Is there any way to increase the effective field of measurement for the SS49E hall sensor?