Arduino Uno R3 USB Microcontroller

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ArduinoSKU: RB-Ard-34
Manufacturer #: A000066

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  • Arduino Uno R3 USB Microcontroller
  • Length: 2.7 inches
  • Width: 2.1 inches

The USB connector and power jack extend beyond these dimensions.
Four screw holes allow the board to be attached to a surface or case.
Note that the distance between digital pins 7 and 8 is 160 mil (0.16"), not an even multiple of the 100 mil spacing of the other pins.

Making Robots With The Arduino, Part 1, by Gordon McComb, Servo Magazine November 2010

  • Microcontroller: ATmega328
  • Operating Voltage: 5 V
  • Input Voltage (recommended): 7-12 V
  • Input Voltage (limits): 6-20 V
  • Digital I/O Pins: 14 (of which 6 provide PWM output)
  • Analog Input Pins: 6
  • DC Current per I/O Pin: 40 mA
  • DC Current for 3.3V Pin: 50 mA
  • Flash Memory: 32 KB (ATmega328) of which 0.5 KB used by bootloader
  • SRAM: 2 KB (ATmega328)
  • EEPROM: 1 KB (ATmega328)
  • Clock Speed: 16 MHz

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