Arduino Uno R3 Rev3 Development Board ATmega328

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Arduino Uno R3 Rev3 Development Board ATmega328



Arduino Uno R3(Rev3) Development Board ATmega328
100%-compatible with Arduino UNO Rev3 and comes with microcontroller ATmega328 and USB-to-Serial converter ATmega16U2




Microcontroller ATmega328 Flash Memory 32KB
Operating Voltage 5V Flash Memory for Bootloader 0.5KB
Input Voltage (recommended) 7-12V SRAM 2KB
Input Voltage (limits) 6-20V EEPROM 1KB
Digital I/O Pins 14 (6 PWM output) Clock Speed 16MHz
PWM Digital I/O Pins 6 Length 68.6mm
Analog Input Pins 6 Width 53.4mm
DC Current per I/O Pin 40mA Weight 60g
DC Current for 3.3V Pin 50mA USB-to-Serial converter ATmega16U2


Power - the Uno R3 can be powered via the USB connection or with an external power supply. The power source is selected automatically.
Memory - the ATmega328 has 32 KB (with 0.5 KB used for the bootloader) flash memory. It also has 2 KB of SRAM and 1 KB of EEPROM (which can be read and written with the EEPROM library).
Input and Output - each of the 14 digital pins on the Uno can be used as an input or output. They operate at 5 volts. Each pin can provide or receive a maximum of 40mA and has an internal pull-up resistor (disconnected by default) of 20-50 kOhms.
Communication - the ATmega328 provides UART TTL (5V) serial communication, which is available on digital pins 0 (RX) and 1 (TX). An ATmega16U2 on the board channels this serial communication over USB and appears as a virtual COM port to software on the computer.
Automatic (software) Reset - rather than requiring a physical press of the Reset button before an upload, the Uno R3 is designed in a way that allows it to be reset by software running on a connected computer.
USB Overcurrent Protection - the Uno R3 has a resettable polyfuse that protects your computer's USB ports from shorts and overcurrent. If more than 500 mA is applied to the USB port, the fuse will automatically break the connection until the short or overload is removed.
Package Content
  • 1 x ElectronKid Uno R3 Development Board
  • 1 x USB Cable