• The for Nano is a small, complete, and breadboard-friendly board based on the ATmega328P (for Arduino for Nano 3.x). It has more or less the same functionality of the for Arduino Duemilanove, but in a different package. The for 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.
• for Nano V3. 0 ATMEGA328P Improved version with 3pcs pin headers (2pcs 15pin headers 1pcs 6pin headers). Each of the 14 digital pins on the for Nano can be used as an input or output.They operate at 5 volts. Each pin can provide or receive a maximum of 40 mA and has an internal pull-up resistor (disconnected by default) of 20-50 kOhms. In addition, analog pins 6 and 7 cannot be used as digital pins, some pins have specialized functions.
• The for Nano has a number of facilities for communicating with a computer, another for Arduino, or other microcontrollers.Such as UART TTL (5V) serial communication and I2C (TWI) and SPI communication.
• An additional expansion board which brings the I/O out to a series of screw terminals that can be handy for projects that are interfacing with a lot of wiring.
• Note: Download (for Arduino) IDE ATmega 328P (old bootloader) the USB chip driver first.