Arduino Uno Pinout. January 13, 2013 by P. Marian Comment 1. Advertisement. ... When the pin is HIGH value, the LED is on, when the pin is LOW, it’s off. The Uno has 6 analog inputs, labeled A0 ...

Both the Arduino Nano and Uno can be powered via their integrated USB connectors. This automatically supplies regulated 5V power to the board, allowing you to use any USB-supported power source ...