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MQ-8 Hydrogen Gas Sensor Features MQ series sensor uses a small heater inside with an electrochemical sensor in order to measure a different kind of gases combinations. They can be calibrated, but, in order to do that, a known concentration of measured gas or gases is needed. The MQ-8 hydrogen gas sensor is suitable for sensing hydrogen concentrations in the air. The MQ-8 can detect hydrogen gas concentrations anywhere from 100-10000ppm. This sensor has a high sensitivity and fast response time.  Note ...

Overview In this tutorial, you will learn how to upload and download data to/from a Firebase database with Arduino UNO and ESP8266 module.Storing data (like sensors data) to a database that can be accessed from anywhere by the internet may be very useful. Firebase makes storing and retrieving data easy. What You Will Learn How to make a database in Firebase How to upload (download) data to (from) Firebase ...

Overview In this tutorial, you’ll learn how to use a 8×8 dot matrix LED module with IC MAX7219. At the end, you’ll be able to display any shape or text on one or more Dot matrix easily, fixed or scrolled, using only 4 digital pins of arduino. What You Will Learn What dot matrix LED is How to use Dot matrix LEDs with Arduino Displaying specific shapes on a Dot matrix LED module Casca...

GY-271 Compass Module Features Magnetic current and field have directly relation with each other. When current flows in a wire (electrons start travelling in one direction), a magnetic field is created. The main idea of compass sensors is based on this relationship. The direction of the earth's magnetic field affects the flow of electrons in the sensor. By measuring these changes in current, the sensor will be able to detect direction.The GY-271 module uses the QMC5883L chip to detect magnetic fields an...