Arduino UNO R3
Explore a microcontroller board and distinguish its processor, programming connection and sensor headers.
ATmega328P · Digital I/O · Analog inputsWhat to look for
Microcontroller
The ATmega328P executes the uploaded program. Unlike a desktop computer, this board is commonly used to control a small, dedicated task.
I/O headers
The labeled headers expose digital connections and analog inputs for supported circuits. Consult the pinout before attaching external hardware.
USB and power
USB supports programming and power. The barrel connector offers another power input through the board’s regulation circuitry; it is not an audio jack.
Independent exterior study by kakaeka. CC BY 4.0. Dimensions and hidden details in the artwork have not been independently measured. See the manufacturer’s reference.
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