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Arduino Uno R3


UNO R3 MEGA328P ATmega16U2 Development Board + USB Cable SGHS For Arduino


UNO R3 MEGA328P ATmega16U2 Development Board + USB Cable SGHS For Arduino
  • Size: 75 * 55 *15 mm / 3 * 2 * 0.6 in
  • Working voltage: 5V
  • Input voltage: no external power supply is required when connecting to USB Or Connect external power supply for 7V-12V DC
  • Microprocessor: ATmega328P
  • Bootloader: Carduino Uno
  • Clock Frequency: 16Mhz
  • Input Voltage: 7-12V (recommend)
  • Input voltage: 6-20V (Limited)
  • Support USB interface Protocol and USB power supply (do not need external power)
  • Support ISP Download function
  • 14 digital Inputs and outputs: working voltage is 5V, Each road can output and access the maximum current of 40mA

(1) Serial port Signal RX (NO.0), TX(NO.1): Connected with the internal chip for ATmega8U2 USB-to -TTL, provides the TTL voltage level serial receive signal

(2) External interrupt(NO.2 and NO.3): trigger interrupt pin,  Can be set to rising edge, falling edge or trigger at the same time
(3) Pulse Width Modulation(NO.3,NO.5,NO.6,NO9,NO.10,NO.11): Six 8-bit PWM outputs are provided
(4) SPI(  NO.10(SS), NO.11(MOSI), NO.12(MISO), NO.13(SCK)  ): SPI communication interface
(5) LED(NO.14): Arduino dedicated to test the LED to retain the interface, the output is high when the LED is lit, otherwise the output is low LED off
  • 6 analog inputs A0 to A5: each channel has a resolution of 10 bits (ie, 1024 different values are input), and the default input signal range is 0 to 5V
  • AREF: the reference voltage for the analog input signal
  • Reset: Signal is reset when the microcontroller chip
  • DC current: 40mA (I/O interface)
  • DC current: 50mA (3.3V port)
  • Flash memory: 32 KB(ATmega328 of which 0.5 KB for the boot process)

Package Includes:

1 x UNO R3 Board (with USB cable)

General pin functions

  • LED: There is a built-in LED driven by digital pin 13. When the pin is high value, the LED is on, when the pin is low, it is off.
  • VIN: The input voltage to the Arduino/Genuino board when it is using an external power source (as opposed to 5 volts from the USB connection or other regulated power source). You can supply voltage through this pin, or, if supplying voltage via the power jack, access it through this pin.
  • 5V: This pin outputs a regulated 5V from the regulator on the board. The board can be supplied with power either from the DC power jack (7 – 20V), the USB connector (5V), or the VIN pin of the board (7-20V). Supplying voltage via the 5V or 3.3V pins bypasses the regulator, and can damage the board.
  • 3V3: A 3.3 volt supply generated by the on-board regulator. Maximum current draw is 50 mA.
  • GND: Ground pins.
  • IOREF: This pin on the Arduino/Genuino board provides the voltage reference with which the microcontroller operates. A properly configured shield can read the IOREF pin voltage and select the appropriate power source, or enable voltage translators on the outputs to work with the 5V or 3.3V.
  • Reset: Typically used to add a reset button to shields that block the one on the board.


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