I'm building a project with Raspberry Pi and some other electronics driving the LEGO Power Functions M-Motor (8883) and I need to know how much current those motors draw under load.

Has anyone done tests and put together a spec sheet for these motor's electronic characteristics?

This is my first post here on LEGO Answers! Hopefully this sharing is welcome.


YES! Philippe Hurbain (Philo) has put together a great and very detailed write-up on those and many other LEGO 9V electric motors.

You can find it here: LEGO 9V Technic Motors compared characteristics

Your current draw for that specific motor @ 9V is:

No load:              65mA  
Loaded (3.6 N.cm):    310mA  
Loaded (6.0 N.cm):    480mA  
Stalled (11 N.cm):    850mA

I was about to ask this very question when a friend pointed me to this write-up.
Hopefully someone else will find it as useful as I did.

  • I found his web site very helpful when I had do find a fitting H-bridge to control LEGO motors with my arduino – MrSmith42 Dec 26 '15 at 14:44

Your Answer

By clicking "Post Your Answer", you acknowledge that you have read our updated terms of service, privacy policy and cookie policy, and that your continued use of the website is subject to these policies.

Not the answer you're looking for? Browse other questions tagged or ask your own question.