Brian Chamberlain
Published © GPL3+

Air Impaired

Studies have shown that CO2 can impair your cognitive abilities. Create awareness of indoor CO2 levels with this fun project.

IntermediateShowcase (no instructions)10 hours2,242
Air Impaired

Things used in this project

Hardware components

Adafruit Pro Trinket – 5V
Adafruit Bluefruit LE - Bluetooth Low Energy (BLE 4.0) - nRF8001 Breakout
K-30 CO2 Sensor by SenseAir
Adafruit Bi-Color (Red/Green) 24-Bar Bargraph w/I2C Backpack Kit
Hammond multi-purpose ABS enclosure

Hand tools and fabrication machines

Soldering iron (generic)
Soldering iron (generic)
Adafruit Multi-size wire stripper & cutter
Electric Handheld Drill


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Custom parts and enclosures

Fancy New Enclosure

New Enclosure Model


CO2 Sensor circuit diagram

Component connection diagram for CO2 sensor prototype


CO2 sensor Arduino Code

Load this onto the Arduino Trinket Pro


Brian Chamberlain

Brian Chamberlain

10 projects • 18 followers
Software Engineer and Hardware Hacker