A keypad is one of the most commonly used input devices in microprocessor applications. In a standard keypad wired as an X-Y switch matrix, normally-open ...

In this quick Arduino tutorial I will explain how you can control a relay using the Arduino Board, one 1K and one 10K resistors, 1 BC547 transistor, one 6V or 12V relay, one 1N4007 diode and a 12V fan ...

Ladyada.net, the personal site of Limor the engineer behind electronics company Adafruit Industries, has an awesome and detailed tutorial to take you from picking out your Arduino chip to ...

OK, year-old pop culture references aside [Kyle] dropped us a line to show us his tutorial on using interrupts with your Arduino. Given the single core nature of your average Arduino’s AVR you ...

Instructables user MakerBee's alert system uses an Arduino microcontroller and a dual-axis accelerometer. When your washer and dryer stop vibrating, the machine will know and alert you accordingly.

Discover how to build a real-time event notification system by integrating NodeMCU (Arduino) with Google Firebase and Laravel. This tutorial covers the complete setup, from hardware to cloud and ...

The Magic Morse algorithm is copyrighted, but he has released the Arduino code as open source in an effort to get people using Morse code once again — it is pretty awesome.