Arduino Nano breadboard-friendly development board based on the ATmega328
The Arduino Nano is a small, complete and breadboard-friendly board based on the ATmega328 (Arduino Nano 3.x). It has more or less the same functionality of the Arduino uno but in a different package. It lacks only a DC power jack and works with a Mini-B USB cable instead of a standard one. The Nano was designed and is being produced by Gravitech.
 
Specifications
Microcontroller
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
16 KB (ATmega168) or 32 KB (ATmega328) of which 2 KB used by bootloader
SRAM
1 KB (ATmega168) or 2 KB (ATmega328)
EEPROM
512 bytes (ATmega168) or 1 KB (ATmega328)
Clock Speed
16 MHz
Dimensions
0.73" x 1.70"
 
Resources:
1. Introduction to Arduino Nano
2. FT232R USB UART Driver
3. Virtual COM Port Drivers
4. HOW TO BURN THE ATMEGA328P BOOTLOADER