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3. Arduino Interlude > Anatomy of the Uno

Anatomy of the Uno

What exactly are you getting when you buy or build an Arduino? Figure 3-5 shows you the board and breaks out the role every component plays.

The Arduino Uno, explained. Credit: The Arduino Team
Figure 3-5. The Arduino Uno, explained. Credit: The Arduino Team
  1. ATmega328P microcontroller: The brains of the Arduino, this is the chip that runs the code you type into the Arduino IDE.

  2. ATmega16U2 microcontroller: This little microcontroller runs the USB serial interface between your computer and the Arduino.

  3. USB-B jack: Use a USB cable to connect your Arduino to your computer to upload new program code and provide power.

  4. 2.1mm center-positive DC power jack: You can also provide power via this DC jack, but the recommended voltage is between 7 and 12 volts.


  

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