Arduino is an open source programmable piece of hardware that can be used to implement interactive projects. All sorts of sensors, potentiometers, displays, LEDs, switches, transmitters, motors are connected by cables and resistors, transistors, multiplexers, capacitors into a useful machine. Arduino is programmed using an open source language, which is similar to Processing and is also suitable for beginners. With Arduino, simple lighting effects can be produced with LEDs, MIDI controllers, musical instruments, robots, printers and a variety of automata.