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

FreeRTOS, simple, easy, robust, and optimised for Arduino IDE. Using FreeRTOS Semaphores to share and protect physical resources.

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

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

Control 256 relays! Seeing is believing!

Use FreeRTOS (simple, easy, robust, & optimised for the Arduino IDE) to reduce the power required for battery or low power applications.

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

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

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

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

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

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.

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

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

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

I was looking for ways to teach students the basics of PLC and found the OpenPLC project. Opensource, free and uses the IEC 61131 standard.

It's an elevator with automatic doors. The code has two FSM, one for the motor that makes it go up and down and one for the automatic door.

H3LIS331DL is a low-power high performance 3-axis linear accelerometer belonging to the “nano” family with digital I²C serial interface.

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

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

This circuit allows for one thermistor input and will output up to four similar values using digital pots.

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

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