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About the Nano 3.0 development board: 1. Can be directly programmed with the Mini USB cable. 2. 100% compatible with program£¬ expansion shields£¬ IDE of Arduino Nano v3.0. 3. USB to serial chip (CH340) supports win7 / win8 32bits£¬ 64bits£¬ Linux. 4. Supports ISP download. 5. Microcontroller: Atmel ATmega328P. 6. Operating Voltage: 5 V. 7. Input Voltage: 7-12 V. 8. Digital I/O Pins: 14 (of which 6 provide PWM output). 9. Analog Input Pins: 8. 10. Flash Memory: 32 KB of which 2 KB used by bootloader. 11. SRAM: 2 KB. 12. EEPROM: 1 KB. 13. Clock Speed: 16 MHz. About Nano IO Extension Board: 1. On-board 5V Regulator£¬ can be supplied by DC power jack. 2. On-board reset button. 3. Extends all the IO of Arduino Nano v3.0 pins£¬ specifically provides an UART interface and an I2C interface. Uses: Smart car£¬ smart home£¬ great for DIY projects