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

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

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

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

Control 256 relays! Seeing is believing!

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

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

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

Writing only Arduino code, it is easy to set up control over experiments and display results on the VirtualPanel Windows application.

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

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

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.

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

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

Embedis is a library for creating simple embedded key-value servers using non-volatile storage like NVSRAM, FRAM, FLASH, or EEPROM.

Program an AVR-IoT WG board externally instead of the onboard debugger. I had to workaround as I bricked my nEDBG debugger on my AVR-IoT WG.

Generates a completely random number utilizing an unused pin and the in-built random number generator.

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

All questions answered in a FAQ-style for the queries for the Arduino, ESP32, embedded systems simulator topics online 🌟🤔

Drop-in replacement for Arduino's serial monitor with variable watches.