New version - Nano V3 built on ATmega168 minicontroller (16MHz) has a small size and can be used with model board for solderless wiring (breadboard). It has a similar structure to  Diecimila/Duemilanove, but different dimensions. To reduce size, the components are mounted on both sides of the PCB.

The board uses the CH340G chip as the converter UART-USB. Chip CH340G - is a budget solution. Stable data exchange results can be obtained at 12Mhz operating frequency (install the driver correctly on the computer according to the instructions).

The Nano V3 can be powered through a miniUSB port (up to 500mA). External power 6-12 v the output VIN or 5V the output of the external power is adjusted to 5V. The power supply automatically selects the maximum voltage.

* This nano ATmega168 has PinOut for V3, not V2.

Technical Details:

The Nano V3 appearance

ATmega168 (16Mhz) minicontroller

Ch340g-usb-uart port

Input voltage 6-12V

Output voltage 5V / 800mA, 3.3V / 180mA (only for new products)

MiniUSB - Connect socket

500mA resets the fuse on the USB port