Each of the 14 digital pins on the Arduino Uno can be used as an input or output, using pinMode(), digitalWrite(), and digitalRead() functions. They operate at 5 volts. Each pin can provide or receive ...

A few other distinctions you'll notice between the two boards' pinouts ... Arduino Nano and Uno can be powered via their integrated USB connectors. This automatically supplies regulated 5V power ...

The Arduino Uno is the old standby of the Arduino world ... cool piece of kit combining a Linux system with the Arduino pinout. Care to take a guess at what the next Arduino board will be called?

The standard interface consists of six analog inputs, fourteen digital input, outputs, a dedicated I2C channel and then miscellaneous power rails and references. An example of the UNO R3 pinout can be ...