Large Motors Class


5 Lessons

14,699 Enrolled

Advanced Level

In this class I will show you how to control motors that are suitable for building go-karts, electric scooters, large robots, and much more. This requires a very different set of knowledge and skills than would be necessary for controlling a small hobby motor.

This class is intended for students with some experience working with motors, and mechanical systems. By the end of the class you will learn how to pick the correct power supply, build a control circuit, and adjust the speed of a motor. You will also learn how to make a circuit which reverses the direction the motor is spinning.

Motor control is demonstrated by a range of techniques such as using motor controllers with analog throttles and also with Arduinos and motor controllers.

I hope that you will come join me in the wild world or large motor control.

Enter an Instructables Contest!

If you've used the skills you learned in this class to design something awesome on wheels, write an instructable about it and enter it in our Wheels Contest for a chance to win some great prizes!

This class is not currently accepting new enrollments. The Classes feature will be retiring soon, but class content will remain accessible.

Class Author:randofo

Randy Sarafan is an artist, designer, inventor, and founder of the Instructables Design Studio. Over the last 10 years he has created hundreds of step-by-step tutorials on diverse subjects ranging from pancakes to self-driving robotic queen-sized beds. He has authored two books, 62 Projects to Make with a Dead Computer and Simple Bots.

His work has been showcased by the NY Times, Popular Mechanics, The Today Show, The Tonight Show, NPR, the BBC, Core77, Boing Boing, and the National Examiner (to name a few). He currently splits his time between Brooklyn, NY and the internet.

Advanced Level:
Robots Class Recommended


Large Motors

Lesson 1: Large Motors

What precisely is meant by "Large Motors?" Over the course of this lesson, this question (and so many more) will be answered.

Large Motors

Large Motors Started

Big Batteries

Lesson 2: Big Batteries

In this lesson we will discuss what you need to power large motors. Spolier alert, this means big batteries! Get ready to learn about some serious power supplies.

Big Batteries

Big Batteries Started

Controlling Motor Speed

Lesson 3: Controlling Motor Speed

Once you can power up a large motor, the next step is learning how to safely control its speed. This lesson provides instructions for controlling the speed of a range of large motors using both analog techniques and Arduino.

Controlling Motor Speed

Controlling Motor Speed Started

Reversing a Motor

Lesson 4: Reversing a Motor

Of course, controlling a motor speed in only one direction is half the story. In this lesson builds upon the last, and teaches you how to reverse the direction the motor spins.

Reversing a Motor

Reversing a Motor Started

Further Considerations

Lesson 5: Further Considerations

Learning how to build circuits to control large motors is only the beginning of the story. Here are some suggestions for increasing the safety of your circuit, and some tips for going further.

Further Considerations

Further Considerations Started

Now that you have the skills, what are you waiting for?
Get out there and make something!