Using a ModeMCU as a voltmeter

Measure volts with an ESP8266 Don't have a multimeter? No problem! Did you know that you can use your NodeMCU (or any ESP8266) as if it were a voltmeter? Sometimes a voltmeter is almost essential to be able to solve any problem that arises when we work with microcontrollers, or with any electronic circuit in general. In this article we will ... Read more

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