In
This Issue
• I²C Magnetic Sensors
• Defect Detection
I²C Sensors
In addition to bridge sensors and SPI
sensors, NVE offers a full line of I²C
magnetic sensors with low pin counts, easy interfaces, and ridiculously simple
software. Sensor functions include various magnetometers, noncontact current sensors,
and angle sensors.
Easy Interface
The simple, two-wire I²C interface is compatible with industry-standard I²C
hardware and software. Unlike other I²C sensors, these sensors are 5-volt tolerant,
so they can connect to 5-volt or 3.3-volt microprocessors.
Ridiculously Simple Software
Our I²C sensors use ridiculously simple software. It takes just two lines of code
to read the sensors:
Wire.requestFrom(36,2);
//Request two bytes; I²C address = 36
sensor = Wire.read()<<8|Wire.read();
//Read sensor
For angle sensors, the code returns the angle in tenths of a degree, and for magnetic
sensors, it returns an 8-, 10-, or 24-bit value—depending on the sensor—proportional
to the magnetic field. No writing to the sensor is required—you can simply
read the data repetitively. Calibration constants and other data can be read and
written to sensor memory locations, enabling simple, intuitive software.
Auxiliary outputs include comparators and PWM outputs.
Good Things Come in Small Packages
The parts come in 2.5 by 2.5 mm DFN6 packages for tight spaces. The parts are
rated to the full -40 to 125°C range.
Breakout Boards
0.8 by 0.4 inch (21 by 10 mm) breakout
boards feature pre-soldered sensors, standard 0.1-inch headers, and 1 mm-pitch
card-edge connectors for easy connections.
Immediate Delivery
The I²C sensors
and breakout
boards are in stock for immediate delivery.
Demonstration
We demonstrate these sensors' ridiculously simple interface connecting an I²C
current sensor to an Arduino with just two pins and two lines of code:
NVE in the Literature
 Automatic
visual identification of defects by magnetic field imaging using alternating current
field measurement technique, Journal of Magnetism and Magnetic Materials,
October 2025.
An NVE TMR analog magnetometer sensor to detect defects in oil storage
tanks and pipelines:
Excerpt:
“Tests on irregular defects yield reconstruction errors within 5%, demonstrating
strong stability and generalization for industrial scenarios.” |
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