[![555conductivity-buzzer.png](https://i.publiclab.org/system/images/photos/000/006/811/medium/555conductivity-buzzer.png)](https://i.publiclab.org/system/images/photos/000/006/811/original/555conductivity-buzzer.png)

http://pvos.org/coqui/

(excerpted text:)

The Coquí is an audio-based scientific instrument platform.

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.