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!

Simple to build and useful instrument for your lab.

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

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

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.

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.

Another simple to build useful instrument in you lab.

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

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

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

An arduiNOOB friendly tutorial for beginners on daisy-chaining.

A quick and compact Arduino Nano setup with four DIP switches to allow for mode selection. Power is provided by CR2032 battery package.

Discharge a fully charged Lithium-Ion cell through a resistor while measuring the current flowing through the resistor to calculate capacity

You'll learn how to create an automation system to communicate 3 Arduinos via RS485.

The maximum signal frequency that the oscilloscope can display is 20 kHz, and the maximum input voltage is 5 V without a voltage divider.

Oscilloscope for Android device and Arduino.

Control a relay connected to Arduino with an infrared remote - quick and easy.

The device is sufficiently accurate and uses minimum number of external components.

Measuring Ambient Light with I2C BH1750 Digital Light Sensor and Arduino - Quick and Easy