Battery powered CO₂ meter (well done)

In this tutorial I am going to teach you how to add a battery to any your microcontroller-based project, correctly, without danger. The uses are endless and, although I am going to use the Homemade CO2 Meter as an example, you can use it in any other project, be it based on Arduino, ESP8266, ESP32, or any other microcontroller. Do not … Read more

Are home CO₂ meters as reliable, accurate and precise as commercial ones?

This question about the reliability, precision and accuracy of home CO2 meters, appears repeatedly and, the truth, I felt that it was time to write a few lines about it because there is very little informed opinion on the internet and it can be difficult to know the truth between so much opinion. This article is pending review, ... Read more