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About the Mega2560 development board: - Can be directly programmed with the USB cable. - 100% compatible with program£¬ expansion shields£¬ IDE of Arduino Nano v3.0. - USB to serial chip (CH340) supports win7 / win8 32bits£¬ 64bits£¬ Linux. - Supports ISP download. - Microcontroller: Atmel ATmega2560. - Operating Voltage: 5 V. - Input Voltage: 7-12 V. - Digital I/O Pins: 54 (of which 15 provide PWM output). - Analog Input Pins: 8. - Flash Memory: 256 KB of which 8 KB used by bootloader. - SRAM: 8 KB. - EEPROM: 4 KB. - Clock Speed: 16 MHz. About Nano IO Extension Board: - Compatible with Arduino Mega2560 R3£¬ UNO R3£¬ Leonardo R3. - Connection bridge between the modules and the Arduino board. - Lead out the SPI£¬ UART£¬ I2C£¬ PWM interface and analog interface of Arduino board. - On-board reset circuit£¬ power and reset indicator. - The Pin headers is 2.54mm pitch. - Great for DIY project.