This is a budget Arduino Mega R3 clone with a CH340G used as USB-to-serial interface, rather than the ATmega16U2 used in the genuine Arduino Mega R3. Based around the 16MHz ATmega2560, it is a functionally identical clone of the open source Arduino Mega.

It can use most Uno shields, but some may require additional wiring or configuration adjustments due to differences in pin layouts and communication protocols. The Mega has fifty four digital I/O pins and sixteen analog inputs compared to the Uno's fourteen digital I/O pins and 6 analog inputs. It also has much larger memory - 256kB flash memory for the Mega compared to 32kB for the Uno. So in short, a mega version of the Uno.

• Microcontroller: ATmega2560
• Clock Speed: 16 MHz
• Operating Voltage: 5V
• Input Voltage: 7-12V
• 3.3V Power Out: up to 50 mA
• 5V Power Out: up to 800 mA
• Digital I/O Pins: 54 (15 support PWM output)
• Analog Input Pins: 16 (with 10-bit resolution)
• Flash Memory: 256kB (8kB used by bootloader)
• SRAM: 8 kB
• EEPROM: 4 kB
• Serial I/O: 4 UARTs, one SPI and one I2C interface

• Mega2560 manual
• Mega2560 pinout details (official)
• Mega2560 schematic

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