A technique for drastically reducing the pins required by a matrix keypad is described.

Did you ever get into a situation where you had to wire up two, three or more I2C sensors to your Arduino just to realize the limitation?

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

Simple Arduino Uno - ESP8266 software serial integration.

If you can't find a voltmeter at home or anywhere else, then this hack is for you!

An Arduino powered floppy disk controller and reader/writer for making and writing disk images from and to old AmigaDOS floppy disks.

The cheapest micro soldering station in the world, using a cheap USB soldering iron.

A quick and simple guide on how to easily connect your Arduino to the pixy cmuCAM!

An Arduino powered floppy disk controller and reader for making disk images from old AmigaDOS floppy disks.

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

Things you should know using ESP8266 WiFi module for its safety and easiness as it's very delicate module to use.

Keypads are used in all types of devices, including cell phones, fax machines, microwaves, ovens, door locks, etc.

You'll learn what is the finality of standalone Arduino and how it is applied in real projects.

This project can add two 3-digit binary numbers to turn into a 4-digit binary number. Math homework solved!

Learn how to submit your Arduino-based project. It may even get featured on the Arduino social channels!

In this tutorial, I am going to show you how to build a voltmeter with a big Nokia 5110 LCD display using Arduino.

How long have we been pressing this button? (Interruptions and EEPROM)

Did you ever wonder what happens between the time you click on "Upload" and your sketch starts running? Here's how you can find out...

I really want to make a Raspberry Pi laptop but just can't find the right size trackpad so in this project we will be salvaging an old one.

A RFID module connected to two LEDs.

nRF24L01 radio transceiver provides very efficient and inexpensive way to establish communication between microcontrollers.

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

Improved serial debugging, with debug levels and simple software debugger, to see/change global variables, add watch, or call a function.

7 awesome cases for 7 different circuito.io-supported components. It's 3D time!