Public Lab Wiki documentation

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.

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

[activities:coqui]

Add your own activity Request an activity guide

Guides should include a materials list and a step-by-step construction guide with photo documentation. Learn what makes a good activity here.

---

Frequently Asked Questions

Ask a question about the Coqui

[notes:question:coqui]

---

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

• 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

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.

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

[activities:coqui]

Add your own activity Request an activity guide

Guides should include a materials list and a step-by-step construction guide with photo documentation. Learn what makes a good activity here.

---

Frequently Asked Questions

Ask a question about the Coqui

[notes:question:coqui]

---

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

• 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

What Does It Do?

The Coqui: using audio as a sensor data format. 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.

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

[activities:coqui]

Add your own activity Request an activity guide

Guides should include a materials list and a step-by-step construction guide with photo documentation. Learn what makes a good activity here.

---

Frequently Asked Questions

Ask a question about the Coqui

[notes:question:coqui]

---

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

• 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

What Does It Do?

The Coqui: using audio as a sensor data format. 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.

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

[activities:coqui]

Add your own activity Request an activity guide

Guides should include a materials list and a step-by-step construction guide with photo documentation. Learn what makes a good activity here.

---

Frequently Asked Questions

Ask a question about the Coqui

[notes:question:spectrometry]

---

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

• 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

What Does It Do?

The Coqui: using audio as a sensor data format. 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.

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

[activities:coqui]

Add your own activity Request an activity guide

Guides should include a materials list and a step-by-step construction guide with photo documentation. Learn what makes a good activity here.

---

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

• 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

What Does It Do?

The Coqui: using audio as a sensor data format. 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.

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

[activities:coqui]

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

• 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

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

[activities:coqui]

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

• 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

[activities:coqui]

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

• 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

[activities:coqui]

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

• 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

[activities:coqui]

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

• 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

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

• 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

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

• 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

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, 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 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

• 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

Notes:

• 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 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

• 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

Notes:

• 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 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

• 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

Notes:

• 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 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

• 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

(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

(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 is 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