This project shows how to build a CO² for use in your home or office. With this device you can know at a glance if the air you are breathing is high in carbon dioxide. Using a simple color coded LED bar graph it displays the current CO² level. Each band is roughly 100 ppm of CO² increase. The range of the device is from 300 ppm (1 led lit) to 2,700 ppm (all 24 leds lit). For the precise reading use your mobile phone and connect to it over Bluetooth to monitor/track readings over time.
Stop breadboarding and soldering – start making immediately! Adafruit’s Circuit Playground is jam-packed with LEDs, sensors, buttons, alligator clip pads and more. Build projects with Circuit Playground in a few minutes with the drag-and-drop MakeCode programming site, learn computer science using the CS Discoveries class on code.org, jump into CircuitPython to learn Python and hardware together, or even use Arduino IDE. Circuit Playground Express is the newest and best Circuit Playground board, with support for MakeCode, CircuitPython, and Arduino. It has a powerful processor, 10 NeoPixels, mini speaker, InfraRed receive and transmit, two buttons, a switch, 14 alligator clip pads, and lots of sensors: capacitive touch, IR proximity, temperature, light, motion and sound. A whole wide world of electronics and coding is waiting for you, and it fits in the palm of your hand.