Comments on: LEGO NXT Motor Wiring

By: DIY Arduino Circuit | BrickEngineer: LEGO Design

DIY Arduino Circuit | BrickEngineer: LEGO Design — Wed, 04 Jan 2012 21:28:59 +0000

[...] on this sometime in the near future. In the meantime check out posts on LEGO NXT motor control: LEGO NXT Motor Wiring Hacking the LEGO Mindstorms NXT Standard Motor Be Sociable, Share! Tweet [...]

By: Doogy1st

Doogy1st — Wed, 11 May 2011 06:15:06 +0000

Hi. Thanks for the info, very helpful. I’d like to know how we can generate the two pwm signals (a link maybe) because i tried with a pic16f84a (output max) but the voltage it delivers is too low.

By: admin

admin — Fri, 06 May 2011 00:55:27 +0000

I don’t know of any constraints.
I use 1 meter long cables for some of my applications and there have been no problems.

By: Navin

Navin — Sat, 30 Apr 2011 15:10:10 +0000

is there any constraint on the length of the RJ12 cable ??

By: irina

irina — Tue, 28 Sep 2010 12:28:30 +0000

Hi ,
how can i control other motors using the NXT ? can I connect the wires to a toys car motor – for example ?

By: admin

admin — Mon, 30 Aug 2010 06:34:48 +0000

Sorry for the horrible delay in my reply.
We have not solved this problem.

You would need to monitor the two encoder lines which would allow you to determine changes in angle of 0.5º.
Keep current going to the motor until you have rotated the desired amount.

We have not yet implemented the code to monitor the angle changes.
When we do, we will post the solution.

By: antonio moyano

antonio moyano — Wed, 24 Mar 2010 18:27:52 +0000

Hello. I am a teacher of Spain and I need to move the motor with arduino degree to degree (steps of 1º). How can I do? thank you

By: admin

admin — Mon, 05 Oct 2009 02:57:37 +0000

The WHITE and BLACK wires (Motor 1 and Motor 2) are used in conjunction to deliver power to the motor. If the white wire is positive and black is negative, the motor will turn one way. If you reverse the polarity, the motor will turn the other way. They both must be pulse width modulated (pwm) to achieve variable speed.

By: peter

peter — Sun, 05 Apr 2009 15:25:49 +0000

hi
there are 2 pwm signals for each output port. but which one is used to control the motor. black or white?

By: Philo

Philo — Fri, 05 Sep 2008 06:52:25 +0000

Thanks for the plug ;o)

Note that there are some internal photos of the NXT motor here: http://philohome.com/nxtmotor/nxtmotor.htm and schematics here: http://www.brickshelf.com/cgi-bin/gallery.cgi?i=1846577