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Arduino is an open source hardware and soft ware company, Project and user community that designs and manufactures single board microcontrollers and micro controller Kit  for building digital devices.

Arduino board designs use a variety of micro processors and controllers . The boards are equipped with sets of digital and analog Input/output pins that may be interfaced to various expansion boards and another  circuits.

Arduino uses:

1-     Sensors 

Arduino can control with a variety of sensors such as light , temperature , pressure , humidity sensors and others .

2-     Protections

They are prefabricated boards that are compatible with upper party of the Arduino and provide the ability to add such as controlling motors , connecting to the communications and others.

The Arduino advantages:

1. Easy to handle .
2. They simplicity of the programming language.
3. Its Small size .

Arduino disadvantages:

Arduino boards can only supply DC motors with electric power for a limited time because this causes damage to the internal components.

Types of Arduino:

1. Arduino uno .
2. Lilypad Arduino .
3. Red Board.
4. Arduino Mega.
5. Arduino Leonardo.