NVE Sensor and Isolator News
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    November 2024 Electrifying  News  From  NVE
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In This Issue
New Angle Sensor Arduino Shield

Off-Axis Angle Sensing

Arduino Pseudocode

Upcoming Tradeshows
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Quick Links
Sensor Selector Guide

Isolator Cross Reference

Online Store

Contact Us
Twitter
YouTube
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New on YouTube
Tradeshow recap
World's Most Sensitive Ultraminiature Rotation Sensor
High-speed polling with TMR sensors
TMR Analog Keyboard Switch Sensor
How We Test Our TMR Magnetic Sensors
Precision Proximity Sensing with a New TMR Sensor
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Datasheet Updates
Our angle and rotation sensor datasheets have been updated with illustrative C++/Arduino code.

Our sensors interface easily to Arduinos, which are popular with our customers.
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Holidays
NVE will be open on Veterans’ Day (Monday, November 11).
Cornucopia
 
We will be closed Thursday and Friday, November 28 and 29 for the Thanksgiving holiday.

Online orders placed during holidays will be processed the next business day.

Product support is available 365 days a year, including holidays, at:
sensor-apps@nve.com
or
iso-apps@nve.com
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NEW! Angle Sensor Arduino Shield
 
NVE’s SHIELD02 is a new demonstration and development board for a broad range of NVE tunneling magnetoresistance (TMR) angle and rotation sensors. The printed circuit assembly is in the form of an Arduino shield.
 
The Shield board is compatible with all 12 of NVE’s TMR angle and rotational sensor breakout boards. Sixty RGB LEDs indicate the angle, and colors indicate direction of rotation.

A diametrically-magnetized neodymium magnet is included, and a magnet fixture allows the magnet to be positioned on-axis or in one of four off-axis positions.

Off-Axis Angle Sensing
NVE TMR sensors have high sensitivity and are uniquely suited for measuring rotation off-axis, allowing flexibility in applications such as motor control and water meters. The Shield is configured to demonstrate off-axis angle parallel-plane or perpendicular-plane positions.

Ultraminiature Sensors with Simple Interfaces
All of the sensors come in 2.5 mm x 2.5 mm DFN6 packages, and they have a variety of features designed for different applications:
  •  Analog versions have large signals and ultralow power consumption.
 
  • A high-speed, low impedance analog version is ideal for interfacing directly with microprocessors or ADCs.
 
  • Digital versions have CMOS quadrant truth table outputs.
 
  • SPI and I²C versions have ridiculously simple interfaces that allow you to read the angle with no setup and a just a few lines of code..
ALT002-14E-EVB01

Compatible Sensors
The 0.8 x 0.4 inch (21 x 10 mm) EVB01 breakout boards are sold separately. They have pre-soldered sensors and 1 mm pitch NVELink card-edge connectors. The boards also have 0.1" headers, which can be soldered to hook up a sensor with only four to six wires.

The Shield is compatible with 12 breakout boards:
  ALT521-10E-EVB01: Ultrahigh sensitivity analog angle sensor
  AAT001-10E-EVB01: Low-power analog angle sensor
  AAT003-10E-EVB01: Low output impedance analog angle sensor
  AAT006-10E-EVB01: High-sensitivity analog angle sensor
  AAT009-10E-EVB01: Ultralow-power analog angle sensor
  AAT101-10E-EVB01: Full-bridge low-power analog angle sensor
  ADT001-10E-EVB01: Digital quadrature rotation w/fault sensor
  ADT002-10E-EVB01: Low-hysteresis quadrature rotation sensor
  ADT005-10E-EVB01: Standard digital quadrature rotation sensor
  ASR002-10E-EVB01: SPI interface factory-calibrated angle sensor
  ASR012-10E-EVB01: I²C interface factory-calibrated angle sensor
  ASR022-10E-EVB01: ABZ encoder sensor

Software
Arduino software for each breakout board can be downloaded from the NVE GitHub repository.

Demonstration Video
This video shows the Shield in action:
 
SHIELD02 Demo

 
In Stock
The new Shield and breakout boards are in stock for immediate delivery.
 
Buy Online
 
Download the Shield02 Datasheet »
 
Off-Axis Angle Sensing
 
With proper magnet placement, NVE angle and rotation sensors can be used off-axis with the same accuracy as the standard on-axis configuration.

Here is a popular system with a diametrically magnetized ring magnet mounted on a shaft, with an angle sensor displaced vertically and radially to detect the rotating field:
 
Parallel Plane Off-Axis
Parallel Plane Off-Axis Magnet Configuration


Our online app lets you to optimize the sensor location.

A second useful configuration is possible with the magnet plane perpendicular to the plane of the sensor, as shown below:

Perpendicular Plane Off-Axis
Perpendicular Plane Off-Axis Magnet Configuration


Click here to download a detailed application bulletin on off-axis sensing.
 
Arduino Pseudocode
 
AAT003 analog angle sensors can be connected directly to microcontroller analog inputs:
 
AAT003-Arduino interface
 
It takes just one line of code to read the sensor, calculate the angle, convert radians to degrees, and scale to 0 to 360 degrees:

float angle=(atan2(analogRead(A1)-512,analogRead(A3)-512)*45.0/atan(1))+180.0;

Likewise, I²C and SPI sensors have ridiculously simple interfaces, with no initialization, setup, or commands required. Here is an example of the code to read I²C angle sensor using the standard Arduino I²C library:

Wire.requestFrom
(0x24,2); //2 bytes from sensor I²C address = 0x48/2 = 0x24
int angle=Wire.read()<<8|Wire.read(); //Read 2 bytes; angle in 1/10 degrees
 
 
For more software examples, visit our GitHub Repository.

Upcoming Tradeshows
  
ElectronicaElectronica
 November 12 to 15, Munich
 
Billed as the world’s leading trade fair and conference for electronics. NVE’s unique spintronic isolators and sensors have customers worldwide, many of whom attend.

Four distributors will represent us at the show:
 
Distributor    Booth   
  Angst+Pfister Sensors and Power  
B3.417
HY-LINE Technology B6.W02
Dimac Red B4.110
Digikey B4.578
 

Sensors ConvergeSpace Tech Expo Europe
 November 19 to 21, Bremen, Germany
 
Europe’s premier business-to-business space engineering event for spacecraft, satellite, launch vehicle, and space-related technologies.

NVE a long history of rad-tolerant isolators and sensors.

See our distributors Dimac Red in booth S47 and Rhopoint Components in booth R21.
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