Overview:
The SainSmart Nano V3.0 can be powered via the mini-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.
Features:
   ◠Automatic reset during program download
   ◠Power OK blue LED on the bottom, Green (TX), red (RX) and orange (L) LED
   ◠Auto sensing/switching power input
   ◠Mini-B USB for programming and serial monitor
   ◠ICSP header for direct program download
   ◠Standard 0.1" spacing DIP (breadboard friendly)
   ◠Manual reset switch
Specification:
   ◠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
Pack List:
   ◠1x SainSmart Nano 3.0 Board
   ◠1x mini USB Cable