There's more...

We can achieve finer control of the motors using a pulse width modulated (PWM) signal and expand the available input/output using an I/O expander.

Get Raspberry Pi 3 Cookbook for Python Programmers - Third Edition now with the O’Reilly learning platform.

O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.