Power from NodeMCU, Wemos Mini D1 and Arduino
What do we need to consider when powering external sensors and actuators?
Arduino
The CO2 sensor bible MH-Z19B
Discover all the secrets of the MH-Z19B CO2 sensor in one place. An inexpensive, accurate (for the price) and very easy to use CO2 sensor.
Easily connect an SSD1306 OLED display (or two) to ESPEasy
Using an OLED display with ESP Easy is very easy. Here are the step-by-step instructions with video
Comparison CO2 sensors MH-Z19B vs Senseair S8
Here you will find the differences and similarities between the MH-Z19B and Senseair S8 CO2 sensors.
A home CO2 meter with Wifi against the coronavirus: The CO2 Easy
Easily build your own quality CO2 meter in an afternoon
VTX FPV video transmitter control with Arduino
Do you want to control a VTX video transmitter with an Arduino? Here's how to do it.
How do I go about creating a new circuit?
How is the design of a homemade circuit? Let's talk about the design and assembly of electronic circuits.
Geiger Counter (Radioactivity Meter)
Contents1 How can I measure radioactivity?1.1 Making a Geiger counter from scratch?2 Building a Geiger counter kit?3 Assembling the Geiger counter4 The STS-55 Beta and Gamma radiation detection tube 3D printed box6 Sending radioactivity data to the internet7 Want to have your own Geiger-Müller counter?7.1 Geiger counters in kit form7.2 Geiger counters ... Read more
CO2 meter with ESP8266
CO2 (carbon dioxide) is a dangerous gas for humans. In high concentrations it can cause dizziness, headache, high blood pressure, rapid heart rate, asphyxia and unconsciousness.