WEBVTT

00:00:00.456 --> 00:00:03.321
♪ What direction? ♪

00:00:03.321 --> 00:00:05.365
We have a new demo for Sensors Converge

00:00:05.365 --> 00:00:09.387
showing NVE's revolutionary
omnidirectional magnetic sensor.

00:00:10.248 --> 00:00:11.754
We have three magnets

00:00:11.754 --> 00:00:15.173
driven by three actuators
in three axes.

00:00:16.517 --> 00:00:20.545
The meter shows the sensor output
is consistent in any direction.

00:00:25.236 --> 00:00:30.820
The sensor is just 1.1 mm square,
for excellent spacial sensitivity.

00:00:31.306 --> 00:00:35.013
The sensor is sensitive in-plane
like an MR sensor...

00:00:37.402 --> 00:00:38.718
Cross axis...

00:00:43.398 --> 00:00:45.944
...and perpendicular-plane like a Hall effect.

00:00:52.596 --> 00:00:58.295
NVE's revolutionary omni-TMR™ technology
makes this magic possible.

00:00:59.499 --> 00:01:02.517
In-plane, the lower layer in the TMR stack--

00:01:02.517 --> 00:01:03.885
represented in green--

00:01:04.666 --> 00:01:06.987
rotates to align with the B-field,

00:01:06.987 --> 00:01:09.820
and the resistance drops as the field increases.

00:01:11.596 --> 00:01:15.172
When a perpendicular magnetic field
is applied to the TMR,

00:01:15.534 --> 00:01:20.580
the upper layer of the stack rotates
from an in-plane orientation at low fields...

00:01:20.798 --> 00:01:23.188
...to a perpendicular direction at high fields,

00:01:23.188 --> 00:01:25.001
and the resistance drops.

00:01:25.694 --> 00:01:28.349
This unique dual sensing-layer TMR structure

00:01:28.349 --> 00:01:33.311
allows a single sensor to detect
magnetic fields in any direction.

00:01:35.504 --> 00:01:38.393
We can easily connect the omnidirectional sensor

00:01:38.393 --> 00:01:41.076
directly to microprocessors that have preamps,

00:01:41.524 --> 00:01:46.615
such as the ATMega32U4
in an Arduino Leonardo or Micro.

00:01:47.328 --> 00:01:50.679
The differential preamp buffers
the high impedance sensor

00:01:50.679 --> 00:01:53.485
and boosts the signal for excellent resolution.

00:01:55.414 --> 00:01:57.522
Here's the Arduino program:

00:01:57.522 --> 00:02:00.666
We initialize the A-to-D
for a differential amplifier

00:02:00.859 --> 00:02:02.859
with a gain of 40.

00:02:03.516 --> 00:02:05.948
This routine reads the ADC.

00:02:07.423 --> 00:02:12.810
The program also runs the servos,
and drives the meter and OLED display.

00:02:14.670 --> 00:02:18.755
AKT001-14E sensor features include:

00:02:19.127 --> 00:02:20.570
omnidirectional,

00:02:21.231 --> 00:02:22.947
ultra-wide field range,

00:02:24.246 --> 00:02:26.997
and are virtually impossible to saturate.

00:02:27.727 --> 00:02:30.232
And they're ultraminiature.

00:02:30.551 --> 00:02:33.942
Contact NVE or visit nve.com

00:02:33.942 --> 00:02:36.481
to buy sensors or breakout boards.

00:02:37.261 --> 00:02:39.157
Visit us at Sensors Converge

00:02:39.157 --> 00:02:44.102
May 5 to 7 in Santa Clara
to see this and other live demos.