Arduino Tutorial

I believe what makes Arduino popular is how it makes microcontrollers easier to use. I remember the time when I have to spent hours coding a project and then spend money on programming hardware. Arduino has its limitations, but the platform helps create tons of electronic projects even for non-engineers. …

If you've been using Arduino, you might have used or have heard about the ultrasonic sensor. Most of us use it for level/distance measurement while some use it to detect an obstacle in front. What most of us don’t know is that there is an underlying flaw with the ultrasonic …

The MQ-135 “air quality” sensor is part of the MQ series of gas sensors that uses a chemical-sensitive element. The resistance of such elements varies when exposed to certain gases. The MQ-135 is sensitive to multiple gases including Benzene, Acetone, Alcohol, and Ammonium.

Ever since I wrote about timer interrupts, a number of readers have asked me on how to generate a 16-bit pulse width modulation (PWM) signal with Arduino. Well, here it is.

A current sensor lets an Arduino measure how much current flows through a wire, motor, LED strip, battery-powered circuit, or power supply load. In this tutorial, you will learn how to use an ACS712 current sensor with Arduino to measure DC current and display the result on the Serial Monitor. …

An Arduino magnetic sensor has several uses: for reading the speed of a rotating object, for door alarms and for navigation. In this tutorial, we will build a simple magnet detector using a hall effect sensor.

Relays in electronics are useful for controlling a high-power load using a smaller-power circuit. For example, an Arduino or PIC running on 5V, controlling a 240VAC light bulb, etc. This is what we have shown in our Arduino relay tutorial. But did you know that there are different types of …

Wouldn’t it be cool if you could control something by just waving your hands? Well, this is what the grove gesture sensor does. In this post, I will show you how to use this sensor with an Arduino and create a simple gesture control project.

With the 8 x 8 LEDs in a dot matrix, you can create several different characters and graphics. Imagine what you can do if you have a MAX7219 cascaded dot matrix module.

The ADXL345 is an integrated circuit that measures acceleration in 3 axes. Like most sensors, this device comes with an easy-to-use breakout board and is usable through SPI or I2C. This tutorial aims to show how you can interface this accelerometer with an Arduino.