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Coqui

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The Open Water Project aims to

  • develop and curate open hardware and open software useful for water-related applications
  • build and facilitate data infrastructures that allow for easier sharing of water data
  • encourage the growth of communities focused on 'free and open' approaches to water science
  • support ongoing work by grassroots communities interested in their own local water quality issues

The Coqui: using audio as a sensor data format. We're also 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). Read more about this idea on the Coqui wiki, or look for recent updates on Public Lab here.

Activities

This is a list of community-generated guides for specific applications using your coqui. These activities can be categorized, 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.

Activity grid

Add an activity  or request an activity guide you don't see listed

Activities should include a materials list, costs and a step-by-step guide to construction with photos. Learn what makes a good activity here.

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:

  • For more information about the Coqui, post a question to the "water quality" mailing list here) (also listed in the left sidebar)
  • The github repo for a PCB version of the coqui is here

The Coquí is a circuit that allows you to 'hear' the readings from various sensors. Once the Coquí 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.

The design was named (onomatopeically) after the several species of small frogs which have a loud, distinctive call at night.

Demo Coqui applications

water-vmail.png

Building your own Coqui

Building Coqui sensors