Measure rotation speed (RPM) with Optocoupler and Encoder disk and Arduino - Quick and Easy!

The software library to calculate moon age, sunrise and sunset time.

Easily connect Arduino boards at a great distance over RS485 with Visuino.

Build a treasure chest or use an existing storage box, attach a push-button quadrature rotary encoder (endless spinning dial) and lets go!

ESP8266 Arduino Programming Tutorial - Easy to learn, step by step.

How to make projects more robust and reliable using drivers ULN2803, UDN2981 and PNP transistors.

In this project, I am going to make a LAN cable tester with just a few basic electronics components. It cost me just a bit over $3.

Three different way of connecting a push button with an Arduino microcontroller.

Using the built-in Arduino EEPROM to save and restore values - Quick and Easy.

This is my 4th tutorial on how to drive a RELAY (not a relay module) with an Arduino.

In this tutorial, I am going to talk about the PCF8574 8-bit GPIO port extender.

Today we are going to learn about touch switch based on TTP223.

I built the right and left mouse buttons with wall switches.