Serial: 0 (RX) and 1 (TX). Used to receive (RX) and transmit (TX) TTL serial data.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. The ATmega328 has 2 KB of SRAM and 1 KB of EEPROM.Įach of the 14 digital pins on the Nano can be used as an input or output, using pinMode(), digitalWrite(), and digitalRead() functions. The ATmega328 has 32 KB, (also with 2 KB used for the bootloader. The power source is automatically selected to the highest voltage source. ![]() The Arduino 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). It lacks only a DC power jack, and works with a Mini-B USB cable instead of a standard one. It has more or less the same functionality of the Arduino Duemilanove, but in a different package. ![]() ![]() The Arduino Nano is a small, complete, and breadboard-friendly board based on the ATmega328 (Arduino Nano 3.x).
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