The video tutorial explains how to build a companion robot using an Arduino, a flex sensor, and a vibration motor. It covers the assembly of the circuit, integration of components into a stuffed animal, and provides an overview of the code needed to simulate purring. The tutorial emphasizes the importance of careful handling of components and offers tips for customizing the design.

In what ways can the design of the companion robot be customized?

How does the Arduino measure the changes in the flex sensor's resistance?

What role does the MOSFET play in controlling the motor?