Improved version of the soldering iron controller for Hakko 907 iron. To simplify building the controller, LCD screen is implemented.

Use the IO Expander and Relay Expander with the Arduino to control up to 65,280 relays!

Control 256 relays! Seeing is believing!

Simple to build and useful instrument for your lab.

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

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

On this simple tutorial, we will explore how to discover colors using an Arduino and the TCS 3200 sensor, displaying it on an LCD.

The device is capable of testing: PNP, NPN transistors, N or P channel MOSFET, diodes, double diodes, resistors, capacitors...

Make a Linux distribution that is focused on the development of Arduino and IoT. It's a Distro for Arduino.

Probably the most useful Arduino project I've ever made! A automatic tester for a product I sell.

The Companion IC is a very cool looking Clock + Ohmmeter + Capacitance Meter + Diode Tester!

This is a simple square-wave generator that basically uses the TimerOne library allow you to generate a PWM signal at pin 9.

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

Need to control hundreds of relays with your Arduino, ESP8266, Pi, PC or Mac and activate them simultaneously within < 1 ms time window?

A useful tool for accurately measuring long distances.

Arduino Nano and Visuino: Convert Acceleration to Angle From Accelerometer and Gyroscope MPU6050 I2C Sensor - quick and easy.

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

Connect Matrix Keyboard using only 2 Arduino pins by using PCF8574/PCF8574A I2C GPIO - Quick and Easy!

Another simple to build useful instrument in you lab.

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.

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

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

Inexpensive, precision, autorange capacitance meter with a large range.

A study for a linear measuring device with Arduino and photoelectric rotary encoder.