Arduino: Arduino is a open source hardware and software. Arduino is a microcontroller. Since Arduino is open source it have many manufacturer. Arduino project was started in about year 2005. Arduino is very useful for creating cool projects. Arduino is more advantages as compared to normal microcontroller. Arduino is like a tiny computer. 8 bit and 32 bit Arduino are available. We can connect LED, Motors, sensors, GPS module, and so many sensors to the Arduino. Arduino board have microprocessor, crystal oscillator, 5V voltage regulator.