NVE Sensor and Isolator News
    August 2016 Electrifying  News  From  NVE
In This Issue
Angle Sensor Interfaces

Angle Sensor
Demo Video

Quick Links
Sensor Selector Guide

Isolator Selector Guide

Online Store

Contact Us

Document Updates
Short-form Sensor Catalog

(added AAT009
Ridiculously Low-Power Angle Sensor)

New YouTube Videos
AAT003 Angle Sensor and Arduino Controlling Camera Rotation
Ridiculously Low-Power Angle Sensor Powered by a Blueberry
Interfacing Angle Sensors to Microcontrollers
Application Corner
Angle Sensor Interfaces
AAT sensors measure angular position based on rotating magnetic fields. With their large output signal and low output impedance, AAT003 angle sensors easy interface directly to Arduino and similar boards with integrated Analog-to-Digital Convertors.

This reference design uses an Atmel MEGA328 on an Arduino board:

AAT camera schematic

The Arduino reads the sensor, calculates the angle, and drives the stepper motor. Because of the large sensor output, no amplification is needed prior to the Arduinio.

To demonstrate, we control a stepper motor servo to rotate a micro video camera, and use the video frames for an updated picture of our building:

The demonstration uses an off-the-shelf AAT003 Evaluation Board, which includes a sensor and magnet. For the demo, we mounted an Arduino board and a stepper motor shield mounted on the back.

A simple program reads the two sensor analog outputs and calculates the indicated angle using a two-variable arctangent:

Key AAT003 features include:
  • 0.5° maximum angular measurement error
  • Sine and cosine outputs
  • 200 mV/V peak-to-peak output signals
  • 40 kΩ typical device resistance; 20 kΩ output impedance
  • Wide magnet airgap tolerance
   • Ultraminiature 2.5 mm x 2.5 mm x 0.8 mm TDFN6

Sensors, magnets, and evaluation boards are in stock and available for immediate delivery.
AAT003 Evaluation Board

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