One port to role them all.

Create a digital watch for Arduino combined with a 16x2 LCD Keypad Shield and using YAKINDU Statechart Tools.

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

Ever wanted to be able to upload your code directly from Notepad++?

But why?

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.

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

This is an Arduino camera module, using the surveillance camera's digital image processing chip-OV0706.

FreeRTOS, simple, easy to use, robust, optimised for Arduino IDE. Full access to FreeRTOS capabilities, within classic Arduino environment.

A time switching battery powered solar charged circuit, used to power an Arduino Uno and some peripherals.

Make your hardware push data to a Google spreadsheet.

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

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.

We used a TI FDC1004 breakout with an Arduino to measure liquid level in a bottle using the capacitance between two adhesive copper strips.

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.

Using a phone as a makeshift GSM module.

Sketch of transistor tester project from Karl-Heinz Kübbeler, so it's much simpler to study, modify, verify and upload to an Arduino.

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.

Extension to Ben Eater's breadboard computer that allows saving/loading programs and works as a monitor, assembler and disassembler.

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