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Language: en

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♪ Sensor ♪

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Welcome to NVE Corporation's YouTube channel.
We're demonstrating our new ultrasensitive

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evaluation board with an Adafruit Trinket
and a simple Arduino program. We can detect

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small ferrite magnets from several inches away,
small neodymium magnets from half a foot away,

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and large neodymium magnets from two feet away.
The board can also detect the magnetic field

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generated by current conductors.
Here the current in amps is displayed on the Fluke multimeter.

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This evaluation
board is so sensitive it can

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detect its own orientation in the Earth's magnetic field.

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Let's get more precise about the
eval board sensitivity. 

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The Adafruit Trinket's ATTiny85 microcontroller
is limited to only 10-bit resolution,

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which is enough for simple switching applications.
When more precision is needed, we can increase

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the ADC resolution. We'll use our nanovolt
meter for this demonstration. We're powering

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the evaluation board with a AAA battery--
only 1.5 volts. The noise level is

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around 300 microvolts peak-to-peak.
This can be reduced further using twisted wires.

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With the increased resolution, we can detect the small
ferrite magnets switching polarity up to eight inches away.

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The small neodymium magnet
can be detected around 15 inches away.

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And the large neodymium magnet can
be detected well over three feet away. 

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Here's the wiring and Arduino program we use for the
Adafruit Trinket interface. Key features for

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our new evaluation board include:
large 2.5 volts per volt per millitesla sensitivity; 

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polarity sensing over a simple three wire interface;
and a wide supply range down to 0.9 volts.

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You can scan the QR code for more information
and to buy the boards today. These boards

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feature our world's most sensitive ALT021-10E 
TMR magnetometers, which can detect magnetic fields

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as low as 100 nanotesla, offered in a miniature
package, and rated to the extended industrial

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temperature range. Email or call us to discuss your
application. Please like this video if you enjoyed it,

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and subscribe to our YouTube channel for
more updates on new sensor technology.