What are we building? Humans can’t detect magnetic fields, but we use devices that rely on magnets all the time. Motors, compasses, rotation sensors, and wind turbines, for example, all require magnets for operation. This tutorial describes how to build an Arduino based magnetometer that senses magnetic field using three Hall effect sensors. The magnetic
Arduino Magnetometer Continue Reading
Why a fluxgate sensor’s magnetic specs aren’t a current rating: evaluation of range, bandwidth, geometry, external-field rejection and isolation limits.
Fluxgate Current-Probe Evaluation: Field Sensing Versus Calibrated Current Continue Reading
The objective of our project was to develop a wireless sensor device to be used for detecting motor vehicles, along with their direction of travel. The sensor is to be used in a larger system to monitor parking lot traffic by counting ins and outs of vehicles, thus showing which lots are full or not
Magnetometer Parking Sensor Continue Reading
The HMC5883L magnetometer This component (a small chip) HMC5883L, produced by Honeywell, bases its operation on AMR (Anisotropic Magnetoresistive) technology and allows you to be able to measure both the direction and the magnitude of the earth’s magnetic field. This magnetometer HMC5883L has within 3 magneto-resistive sensors arranged on three perpendicular axes (the Cartesian axes x,
