coqui

## What Does It Do? **The Coqui: a simple device to read a sensor via an audible tone.** We're exploring using audio frequencies to convey sensor readings -- like a modem, but even simpler -- in order to make sensor readings more accessible for people (or to enable data transmission over ubiquitous audio jacks on PCs and smartphones). Look for recent updates on Public Lab [here](http://publiclab.org/tag/coqui). ## Activities This is a list of community-generated guides for specific applications using your coqui. These [activities can be categorized](https://publiclab.org/wiki/activity-categories), and some may be more reproduced -- or reproducible -- than others. Try them out to build your skills, and help improve them by leaving comments. Together, we can repeat and refine the activities into experiments. [activities:coqui] **** ## Frequently Asked Questions [questions:coqui] **** [![coquibb.JPG](https://i.publiclab.org/system/images/photos/000/007/410/medium/coquibb.JPG)](https://i.publiclab.org/system/images/photos/000/007/410/original/coquibb.JPG) A Coqui is a simple, inexpensive, open source device that generates an audible tone that is based on any electric resistance-based measurement. For example, a Coqui can measure: * conductivity of liquids * temperature * ambient light ## Build a Coqui Instructions on the breadboard-based "BBv1.0" edition of the Coqui can be found here: http://publiclab.org/notes/donblair/09-30-2014/coqui-bbv1-0 ### Notes - The github repo for a more permanent printed circuit board version of the coqui is [here](https://github.com/OpenWaterProject/coqui) The Coqu&iacute; is a circuit that allows you to 'hear' the readings from various sensors. Once the Coqu&iacute; is assembled, you'll be able to 'hear' the conductivity of a solution, the temperature of a room, or the color of a pH test strip. </br></br> The design was named (onomatopeically) after the <a href="http://en.wikipedia.org/wiki/Coqu%C3%AD">several species of small frogs </a> which have a loud, distinctive call at night.</br></br> <iframe src="//player.vimeo.com/video/100778803?title=0&amp;byline=0&amp;portrait=0" width="600" height="393" frameborder="0" webkitallowfullscreen mozallowfullscreen allowfullscreen></iframe> ### Demo Coqui applications - [Testing the conductivity of a solution](http://publiclab.org/notes/donblair/09-30-2014/coqui-bbv1-0-testing-conductivity-of-a-solution): <iframe width="560" height="315" src="//www.youtube.com/embed/Txu08bFOpaU?list=UUmmEmOGni0fzzDsXiZEVWNw" frameborder="0" allowfullscreen></iframe> - [Reacting to an LED with sound](http://publiclab.org/notes/donblair/09-30-2014/coqui-bbv1-0-reacting-to-an-led-with-sound): <iframe width="560" height="315" src="//www.youtube.com/embed/Snr0Zd8oueE?list=UUmmEmOGni0fzzDsXiZEVWNw" frameborder="0" allowfullscreen></iframe> - [Assessing ambient light levels](http://publiclab.org/notes/donblair/09-30-2014/coqui-bbv1-0-assessing-ambient-light-with-a-photoresistor): <iframe width="560" height="315" src="//www.youtube.com/embed/S1GoPiRVTD0?list=UUmmEmOGni0fzzDsXiZEVWNw" framebordhttps://i.publiclab.org/system/images/photos/000/007/409/original/water-vmail.pnger="0" allowfullscreen></iframe> - [Assessing temperature with a thermistor](http://publiclab.org/notes/donblair/09-30-2014/coqui-bbv1-0-using-a-thermistor-as-a-temperature-probe): <iframe width="560" height="315" src="//www.youtube.com/embed/cvWfdVbV_08?list=UUmmEmOGni0fzzDsXiZEVWNw" frameborder="0" allowfullscreen></iframe> - [Sending water quality voicemails with a coqui using vojo.com](http://publiclab.org/notes/donblair/09-10-2014/water-quality-coqui-voicemails): [![water-vmail.png](https://i.publiclab.org/system/images/photos/000/007/409/medium/water-vmail.png)](http://publiclab.org/notes/donblair/09-10-2014/water-quality-coqui-voicemails) ### Building your own Coqui - [Coqui BBv1.0](http://publiclab.org/notes/donblair/09-30-2014/coqui-bbv1-0): a breadboarded version of the Coqui ### Building Coqui sensors - Making a conductivity probe from a [bottle cap and two metal screws](http://publiclab.org/notes/donblair/09-30-2014/making-a-diy-conductivity-probe-from-a-water-bottle-and-metal-screws) ## Parts list See the initial parts list here: #13459 and #11209 for a DigiKey shopping cart link at $19 per kit. And @kanarinka mentions: > there are a couple other things that are helpful to have that are not shown (like the probe made from the top of a water bottle with two screws in it and alligator clips to attach that to the breadboard) Scans of an invoice from DigiKey: [![Screenshot_2018-02-28_at_9.59.17_AM.png](https://publiclab.org/system/images/photos/000/023/760/large/Screenshot_2018-02-28_at_9.59.17_AM.png)](https://publiclab.org/system/images/photos/000/023/760/original/Screenshot_2018-02-28_at_9.59.17_AM.png) [![Screenshot_2018-02-28_at_9.59.46_AM.png](https://publiclab.org/system/images/photos/000/023/761/large/Screenshot_2018-02-28_at_9.59.46_AM.png)](https://publiclab.org/system/images/photos/000/023/761/original/Screenshot_2018-02-28_at_9.59.46_AM.png)

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