Control 256 relays! Seeing is believing!

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

I found limited documentation on the usage of a color sensor I recently purchased, so here is my attempt to make it more simple.

An Arduino code that displays on a small 0.98" OLED SSD1306 Date/Time and also calculates and displays Salat Time for a given town

Imitate musical instruments and make music with an Arduino and only few external components!

This doorbell can operate without touch the switch.

Arduino and NeoPixel Tutorial appropriate for a beginner.

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

Play Super Mario Bros theme song on a piezo buzzer! It’s very simple and fun, and great as a beginner Arduino project.

Just before creating my next tutorial, which will be using a PIR sensor, I thought I might create a separate tutorial for PIR Sensor.

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

Standalone PC software to use your Arduino as an oscilloscope, supports up to eight channels, at rates up to 100 kHz.

Connect I2C Character LCD Display to Arduino and program it - quick and easy!

Build a line follower using an LM324N with a backup Arduino Nano.

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

Make receiver for Oregon thermo-hygro sensor.

Make your projects colorful.

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

In this tutorial, I will be showing you how to get started with the small 0.91 and 0.96 I2C OLED displays using Arduino and NodeMCU.

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.

Use the latest ATtiny processors in the Arduino Environment. These have the memory capacity of ATmega chips in smaller and cheaper packages.

The bracelet can help you know where there is an obstacle.

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

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