Arduino Mini-Drone Lesson Part 2: Controlling Motors with an Arduino and a Transistor

This video tutorial explains how to use a transistor in an Arduino circuit to control a motor. It begins with an introduction to transistors and their necessity in circuits requiring more current than an Arduino pin can provide. The tutorial then demonstrates building a simple circuit with a potentiometer and LED, explaining the concept of pulse width modulation (PWM) to control brightness. The video progresses to replacing the LED with a motor, using a transistor to manage the current from an external battery pack. Finally, it covers how to connect and control multiple motors using transistors.

What precautions should be taken when connecting an external battery pack to the circuit?

Why is it important to have a common ground in the circuit?

How can multiple motors be controlled using a single transistor?

What happens if the motors are connected in series instead of parallel?