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In this post you can study most important parts of Arduino UNO R3. There are different arduino baords as well. Parts of Arduino Board Reset Switch: this is a push button which user can press. once pressed it reset the arduino which means it goes to the begining of the code which running inside the board. USB Connector: user can connect Arduino board to computer using a usb cable which comes with the board. this USB connectore can be used to connect the usb cable. USB Interface Chip: This chip convert the computer usb signals to ttl signal (ttl means transistor transistor logic) that arduino microcontrol can understand.  Crystal Oscillator: This component generate pulses that requires arduino microcontroler to work Voltage Regulator: This component convert 12V DC to 5V DC that requires by arduino microcontroller Power Port: User can connect 12V DC power adaptor to power the arduino via this port Digital Pins: Those pins can be used to input or output a digital signel (5V = High or 0V =

 Arduino is a combination of development board and software interface that user can write a program and put it in to development bord so that connected hardware to the development such as lights, motors, switches can work according to the program. Arduino Development Board You can purchase this item from online.  ebay ali express Arduino Software Interface You can download this software for free here We will teach you all the things you should know regarding arduino programing in future posts. See you! Bye... Parts of Arduino Board