CO2 traffic lights are often used in classrooms around the world as an indicator when it is important to ventilate the classrooms to reduce the COVID-19 transmission risk. So this built especially addresses the needs for schools and enables them to build a powerful, accurate CO2 traffic light for a much less cost than commercial sensors (that often do not even have WiFi capabilities).
This build uses the Senseair S8 NDIR CO2 sensor that has a high accuracy and is also used in much more expensive professional grade sensors.
The build also comes with 3D printable files of a professionally designed enclosure. This build also uses a standard AirGradient PCB.
Components:
- Wemos D1 Mini
- Senseair S8 CO2 Sensor
- 8×8 LED matrix
- 10cm 3pin low voltage cable to connect the LED matrix to the board
See more on the site here.
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