One port to role them all.

This is a very simple way to control a 3-phase AC installation in a delta configuration.

But why?

In this tutorial, you’ll learn how to use SD and micro SD cards with Arduino in a simple project to measure the environment temperature.

Start coding online with the Arduino Web Editor, save your sketches in the cloud, and always have the most up-to-date version of the IDE!

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

Step by step on how to program a ATtiny85 microcontroller with Arduino Uno development board.

A simple method to notify a problem is to use email, It’s very usefully and simple to share, so I created a library to do it.

Make your hardware push data to a Google spreadsheet.

Regulated smart constant current charger for 9V NiMH rechargeable batteries.

An unofficial tutorial for getting started with the MKR1000 board as there are no official one yet.

Arduino's great, but how in the world do you do two (or more) things at once on separate intervals? You need protothreading!

Clock LCD display adjustable.

Program your Arduino with an Android device over Bluetooth HC05.

Logic Analyzer, for Arduino, other AVR and STM32 with a very nice working processing interface, you could run it also on any Android device.

Simple Arduino Uno - ESP8266 software serial integration.

Arbitrary waves can be drawn, edited, saved, opened and uploaded to the Due via USB, or the Due can run alone controlled by pots & switches.

Using a phone as a makeshift GSM module.

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

Task scheduling is a transformative way to write maintainable code for Arduino and other AVRs. No more spaghetti code. C++ tutorial.

Based on Blockly and BlocklyDuino, here's a multilingual enhanced version with supervision, upload, multi-level blocks, etc.

A single Arduino Uno/Mega can carry up to 14 RS-232 boards. Each board is distinguished by ID, which is set via a DIP switch.

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

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