Arduino Nano
Specifications:
Microcontroller: Atmel ATmega328
Operating Voltage (logic level): 5 V
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 (of which 2KB used by bootloader)
SRAM: 2 KB
EEPROM: 1 KB
Clock Speed: 16 MHz
Dimensions: 0.70” x 1.70”
Features:
Automatic reset during program download
Power OK blue LED
Green (TX), red (RX) and orange (L) LED
Auto sensing/switching power input
Small mini-B USB for programming and serial monitor
ICSP header for direct program download
Standard 0.1” spacing DIP (breadboard friendly)
Manual reset switch
Power:
The Arduino Nano can be powered via the mini-B USB connection, 6-20V unregulated external power supply (pin 30), or 5V regulated external power supply (pin 27). The power source is automatically selected to the highest voltage source.
Package includes:
1 x Arduino Nano V3.0
Official page: https://www.arduino.cc/en/Guide/ArduinoNano