In this video, we build a powerful and simple 12V DC Fan Speed Controller using the TIP3055 power transistor. This circuit allows you to control the speed of a 12V DC fan smoothly using a potentiometer — perfect for DIY electronics projects, cooling systems, and lab experiments.
If you're an electronics student or hobbyist, this project will help you understand how a power transistor controls voltage and current to adjust motor speed efficiently.
