Sometimes, you have to drive four motors, and you need to do so with a certain level of control. You could throw a lot of parts at the problem, but you don’t necessarily have to. As [Shaun Crampton] demonstrates, you can run four brushless DC motors with a single Pi Pico.
This is a companion discussion topic for the original entry at https://hackaday.com/2024/05/17/running-four-brushless-motors-with-a-single-pi-pico/