Original Arduino UNO R3/Mega 2560 R3 Arduino Development Board Programming Learning Board with USB Cable

Note:

this link with 2 models,you can choose Arduino Mega 2560 R3 Board or Arduino Uno R3 Board.

Model:Arduino Mega 2560 R3 Board

Microcontroller:ATmega2560

Operating Voltage:5V

Input Voltage (recommended):7-12V

Input Voltage (limit):6-20V

Digital I/O Pins:54 (of which 15 provide PWM output)

Analog Input Pins:16

DC Current per I/O Pin:20 mA

DC Current for 3.3V Pin:50 mA

Flash Memory:256 KB of which 8 KB used by bootloader

SRAM:8 KB

EEPROM:4 KB

Clock Speed:16 MHz

LED_BUILTIN:13

Model:Arduino Uno R3 Board

Microcontroller:ATmega328P

Operating Voltage:5V

Input Voltage (recommended):7-12V

Input Voltage (limit):6-20V

Digital I/O Pins:14 (of which 6 provide PWM output)

PWM Digital I/O Pins:6

Analog Input Pins:6

DC Current per I/O Pin:20 mA

DC Current for 3.3V Pin:50 mA

Flash Memory:32 KB (ATmega328P) of which 0.5 KB used by bootloader

SRAM:2 KB (ATmega328P)

EEPROM:1 KB (ATmega328P)

Clock Speed:16 MHz

LED_BUILTIN:13