Enter the ExtraCore library for Arduino, a software library that turns two or more Arduinos into a multi-core microcontroller with more pins than you’ll ever need.

Instead of using an FT232RL, ... creation next to the official Arduino USB-to-serial programmer. ... It’s pretty impressive to see his prototyping work with the 16-pin QFN package.

PWM pins work the same way across all Arduino boards, so you don't need to go out of your way to buy a Mega if you already have a board supporting PWM. On the Uno, Nano, and Mini, the PWM pins are ...