Hello friends, I hope you all are doing great. Today, I am going to share the Raspberry Pi 5 CO2 Monitor with Ventilation Fan - Proteus Simulation , the twenty-second project of our IoT Projects series. If you have searched for a Proteus simulation of a CO2 monitor with a Raspberry Pi, here is a complete one. A Raspberry Pi 5 reads an MH-Z19B infrared CO2 sensor and an AHT20 temperature and humidity sensor, shows the CO2 on a 32 x 8 LED matrix and a bi-colour LED, and runs a ventilation fan faster as the air in the room gets staler. A live web dashboard shows the air and lets you run the fan by hand. Every person in a room breathes out air with about 4 percent CO2, 40,000 ppm, while the air outdoors holds about 420 ppm. In a closed classroom or meeting room the CO2 climbs steadily, and lon ...