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README.md

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[![Demonstration of 3 whistle switches](https://i.ytimg.com/vi/_e2mElB8zJs/hqdefault.jpg)](https://www.youtube.com/watch?v=_e2mElB8zJs)
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# Download
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The actual version can be downloaded directly from GitHub [here](https://github.com/ArminJo/Arduino-FrequencyDetector/blob/master/extras/FrequencyDetector.zip?raw=true)
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## Installation
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Use the GitHub *clone or download -> Download ZIP* button, and add the .zip file with *Sketch -> Include Library -> add .ZIP Library...*.
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# Internal operation
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This library analyzes a (microphone) signal and outputs the detected frequency. It simply counts zero crossings and **it does do not use FFT**.

extras/FrequencyDetector.zip

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library.properties

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version=1.0.0
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author=Armin Joachimsmeyer
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maintainer=Armin Joachimsmeyer <armin.joachimsmeyer@gmail.com>
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sentence=Measure frequency of analog captured signal connected to an Arduino and check for noise and mute.
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paragraph=Signal can be delivered e.g. by a microphone. Tested for UNO, Nano and ATtiny85. Example also includes a full blown tone switch (Pfeiffschalter) designed to react to human whistling .
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sentence=Measure frequency of analog captured signal connected to an Arduino and check for noise and mute.<br/>
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paragraph=Signal can be delivered e.g. by a microphone. Tested for UNO, Nano and ATtiny85.<br/>Examples includes a tone switch (Pfeiffschalter) designed to react to human whistling .
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category=Signal Input/Output
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url=https://github.com/ArminJo/Arduino-FrequencyDetector
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architectures=avr

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