Angle sensor/Arduino/laptop computer demonstration

Angle sensor/Arduino/laptop computer demonstration


♪ Circles and Angles ♪ Hello. This is a simple demonstration of
an NVE “AAT” angle sensor. Here in the lab, we often use
expensive GPIB or LabView interfaces But this setup is just
a $20 Arduino board and some free software. Since AAT sensors have large signals,
they don’t need amplification, and we don’t need any external components
or Arduino “shields.” Here’s the block diagram. The “AAT” angle sensor–
the outputs follow the sine and cosine of the magnet angle. The Arduino board,
connected via USB to a laptop. Let’s take a closer look at the software. “Involt” is a Chrome extension that
allows the browser to get data via USB. We uploaded the Involt
Arduino-side software to the board. On the computer side,
we have an index.html page that calls Javascripts,
and specifies the look of the compass dial graphic. This is the key Javascript. It reads data from the Arduino board; calculates the angle from the arctangent
of the sensor sine and cosine outputs; and calls the compass graphic. Of course, with Javascript
we have lots of options for additional calculations. And since the programs
are running in a Chrome browser, we can use Chrome Developer Tools. Here are the demo elements:
As we said, the Arduino board is less than $20,
and the software is all free. We’ve seen that AAT sensors
simplify interfaces because of their large signals. They’re also accurate and small. E-mail or call us
if you’d like our code. You can order angle sensor eval kits
from our Website.

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