WEBVTT

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♪ Everything is awesome! ♪

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Today, we have a "gripping" demonstration
of NVE proximity sensors using Legos.

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There's a sensor on one gripper arm,
and a magnet on the other.

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The sensors' high sensitivity

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allows them to work
with small magnets like this.

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And the magnet can be rotated 45 degrees,
like this, even though that reduces

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the in-plane field by 30%.

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The motor reverses when the sensor
reaches a preset threshold.

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The red LED indicates end of travel.

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A switch selects a close threshold
with a high field...

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or a far threshold with a low field...

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Here's the sensor output vs. distance.

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The magnetic field increases
rapidly as the magnet gets closer.

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These are the two thresholds.

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We're so confident that the sensor
will work at a distance

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that we're willing to put one of our
accountants in harm's way.

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The sensor stops the gripper just short
without squishing the accountant.

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This is the magnet we used,

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and this is the web app
we used to select it.

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The sensors are factory calibrated
and temperature compensated.

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A programmable digital output
lets you run the sensor

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as a magnetic switch
without a microprocessor.

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An Arduino controls the system.

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The H-bridge shield
controls the motor direction,

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and isolates the motor
from the sensor and controls.

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The sensor is just two-wire I²C.

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A program reads the sensor
and controls the motor.

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These are the two thresholds.

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The sensor interface is ridiculously simple.

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The data is a single byte,

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so it's a perfect complement

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for 8-bit microprocessors like this Arduino.

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Here's a summary of the parts
we used for the demo.

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♪ Everything is awesome... ♪

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Everything is awesome about these sensors.

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They're sensitive;

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precise;

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available with analog, I2C, or SPI interfaces;

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they're easy to use;

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and they're ultraminiature.

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Click, email, or give us a shout
for more information,

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or to order sensors and
evaluation boards.

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Thanks to everyone who worked
behind the scenes on this video.