CO2 indicator

Purpose

given the Covid-19 situation, it's essential to minimize aerosols in the room. According several researchs, there is a good correlation between CO2 and possible virus inside a room.

See therefor the investigation/report from University Trier called "COVID-19 Prävention: CO2-Messung und bedarfsorientierte Lüftung". Inspired by the Make-magazin 5/20 ant the article for CO2-traffic light I've started my own project

Function

While the OLED will display the measurments, the idea is to clearly indicate by different colours the concentration of CO2 in a room and the neccesitty of ventilation to lower concentration of possible virus contamination.

Blockdiagram

The blockdiagram shows all connected components, where OLED, CCS811 and BME are connected on the I²C bus.

The button field consits out of three tactical buttons, which will be connected to GND once pressed

Hardware

• Arduino Nano

• OLED display

• BME280 source

• CCS811 Sensor source / datasheet

• optional MQ-2 Sensor

• WS2812B RGB LED

• Ribba picture frame (23x23 cm) from Ikea

• tactical buttons

• 3D-prints for

  • sensor frame (find on my section of Thingiverse)

  • illuminated humming bird from Thingiverse

  • button holder and button surface