The Arduino Nano is a small, complete, and breadboard-friendly board based on the ATmega328 (Arduino Nano 3.0). It has more or less the same functionality of the Arduino Duemilanove or UNO.

We have updated the NANO board with a fresh bootloader. Boards sold from Cytron starting from January 2018 have this new bootloader, while boards manufactured before that date have the old bootloader. First, make sure you have the Arduino AVR Core 1.16.21 or later looking at the Board Manager. Then, to program the NEW Arduino NANO boards you need to chose Processor > "ATmega328P". To program old boards you need to choose Processor > "ATmega328P (Old Bootloader)". If you get an error while uploading or you are not sure which bootloader you have, try each type of processor 328P until your board gets properly programmed.

• Microcontroller: Atmel ATmega328
• Revision: 3.0
• Operating Voltage (logic level): 5 VDC
• Input Voltage (recommended): 7-12 V
• Input Voltage (limits): 6-20 V
• Digital I/O Pins: 14 (of which 6 provide PWM output)
• Analog Input Pins: 8
• DC Current per I/O Pin: 40 mA
• Flash Memory: 32 KB (ATmega328) of which 2 KB used by bootloader
• SRAM: 2 KB (ATmega328)
• EEPROM: 1 KB (ATmega328)
• Clock Speed: 16 MHz
• Dimensions: 0.73" x 1.70"

• 1 x Arduino Nano 3.0
• 1 x Mini-B USB cable

Documents:

• Arduino Nano Official Page
• Arduino V3.0 User's Manual
• Arduino V3.0 Schematic
• Arduino IDE Download
• Online Arduino Create