Arduino Tutorial

The SIM900A is another module from SIMCOM popularly used as a GSM shield for sending and receiving SMS. I’ve already covered the SIM800L, now let’s look at the SIM900A breakout board.

The MQ-3 alcohol sensor is useful for projects that tests levels of alcohol, benzine, hexane or LPG in the air but it is most popularly used as a breathalyzer (breath analyzer) for someone who drank beer, wine or other liquor. Learn how to use this gas sensor in this tutorial.

You can drive an LED on or off using a microcontroller like Arduino or PIC. There’s no problem there because the 20 mA or so current from the pins is enough. You can’t drive loads that require much more current like a motor. This is where the L298N motor controller …

A thermistor is a special resistor whose resistance varies with temperature. Learn how to interface a thermistor with a microcontroller in this tutorial.

Connecting your Arduino project to the Internet is easy though WiFi and modules like the ESP8266 or a WiFi shield. Another option is to ditch wireless and use an Ethernet shield. But what if there’s no WiFi or network cable available? The solution would be to connect to the Internet …

Wireless control is much more convenient, especially at a significant distance. Imagine having wires from your controller to your robot! Also, making your project portable is essentially saying making it wireless (unless you still need to plug it on mains). In this tutorial, we’ll look at popular methods for achieving …

Global Positioning System (GPS) has been around since the 80’s and is still one of the most important features you can add to any electronic system. The idea of tracking something (or someone) is cool enough but doing so without a telephone or an internet connection is much cooler.  In …

If somehow a 16×2 LCD or a Nokia 3310/5110 LCD is too large for your project, then there’s a 0.96″ display you can add to your arsenal. This display is OLED (organic LED) instead of LCD – which means the backlight is unnecessary. In this tutorial, we will look at …

Bluetooth is the most popular way of connecting an Arduino to a smartphone wirelessly. In this tutorial, we will create an Arduino-bluetooth interface and send messages from an Arduino to a smartphone and Arduino to a personal computer.

A sensor is a device that transforms physical quantities like temperature, humidity, pressure, etc., to an electrical signal. Moreover, this signal is often fed to a microcontroller like the Arduino for further processing, displaying or recording. This data from the sensor are often analog in nature, i.e., they vary over …