Take the 2-minute tour ×
LEGO® Answers is a question and answer site for LEGO® and building block enthusiasts. It's 100% free, no registration required.

What combination of motor/Receiver/battery boxes are possible/supported?

example: 2x XL motors, 1x M Motor, 1 light using 1 receiver and 1 battery box.

share|improve this question

1 Answer 1

up vote 6 down vote accepted

The present line of battery boxes all provide 800mA of current and have overload protection to ensure that this level is not exceeded. Here's what the LEGO website has to say about powering motors:

As a rule of thumb, you can drive 2 Power Functions XL-Motors, 3 Power Functions Train Motors or 4 Power Functions M-Motors at the same time from one Power Functions Battery Box.

That's the basic high-level view. LEGO provides more details about each motor. You can check these out on the element specs page. Here's a list providing the current consumption for each motor type under "normal conditions":

So, in order to stay within TLG's recommendations, you shouldn't be running anything totalling more than 800mA from the above list off of a single battery box. Also be aware that if you are doing things which require a lot of mechanical power, such as heavy lifting, your motors will draw additional power. A stalled XL motor will overload the battery box by itself, for example.

As far as I know, overloading the battery box doesn't cause any long term problems, so there isn't an issue with testing your configuration to see if the battery box can handle it.

share|improve this answer
    
Thanks for that. I'm trying to motorize my R2D2, a motor for each leg (tank tracks), a motor for the head and lights –  user849169 Jun 19 '13 at 2:52
    
No problem. That sounds like a fun project. Good luck! –  jncraton Jun 19 '13 at 14:00

Your Answer

 
discard

By posting your answer, you agree to the privacy policy and terms of service.

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