About this item The Nano can be powered via the Type-C USB connection, 7-12V 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. Support for external 5V~12V DC power supply, Support power supply by 9V battery. The Nano is using the chips ATmega328P and CH340, Replace FT232RL. It is a smallest, complete, and breadboard friendly board. It has everything that Diecimila/Duemilanove has (electrically) with more analog input pins and onboard +5V AREF jumper. Uses the CH340G instead of the FTDI FT232RL IC which can improve the transfer speed, increase the stability in windows and solve the issues with FTDI drivers bricking non-original chips, ATMEGA328P offers even more programming and data memory space. It also has a pin layout that works well with the Mini or the Basic Stamp (TX, RX, ATN, GND on one side, power, and ground on the other). Comes with 5packs of Nano V3.0 Micro Controller Module, each Nano V3.0 Micro Controller module is equipped with 3pcs pin headers (2pcs 15pin headers +1pcs 6pin headers), no welding needed.