(For more information about the Coqui, please feel free to contact @donblair at don.blair at organizers dot publiclab dot org, or post a question to the "water quality" mailing list 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

• Testing the conductivity of a solution:

• Reacting to an LED with sound:

• Assessing ambient light levels:

• Assessing temperature with a thermistor:

• Sending water quality voicemails with a coqui using vojo.com:

Building your own Coqui

• Coqui BBv1.0: a breadboarded version of the Coqui

Building Coqui sensors

• Making a conductivity probe from a bottle cap and two metal screws