PWM pins work the same way across all Arduino boards ... One is using an analog input like a potentiometer. In this case, the analogWrite() value is dependent on the value read from the input.

There are five input pins to the chip which lets you connect one analog pin to any one of 32 analog pins. Of course, in addition to the five control lines, you need some handshaking lines ...

The ExtraCore library comes from [Dustin Andrews], and allows anyone to control the input and output pins of two Arduinos with the same ease as a single Arduino. The hardware setup is fairly ...