Here you will find a growing number of examples and tutorials for accomplishing specific tasks or interfacing to other hardware and software with Arduino. For instructions on getting the board and environment up and running, see the Arduino guide.
The traditional first task, this tutorial shows you how to turn an LED on and off with your Arduino board.
Connect multiple LEDs to your Arduino board using a breadboard, and turn on them on and off.
The simplest sensor.
These use the same wiring and code as a push-button, but can detect movement and orientation of objects.
This is a knob, one of the simplest analog sensors, used to detect rotation.
These include light sensors, temperature sensors and more.