My wife bought me a Mindstorms NXT 2.0 for my birthday. I've been reading up on it from as many sources as possible however apart from the 9695 Education Resource Set which adds some additional bricks to the set, is the Mindstorms compatible with any other Lego sets, specifically the Technics?

If so, where can I get more information on how these sets are interchanged?

3 Answers 3



The current Mindstorms sets are completely Technic orientated and use the Technic pins (i.e. [part:3673:7]) to connect to the newer Technic Beams (i.e. [part:32316:7]) as well as the original Technic Bricks (i.e. [part:3894:7])

The various different size pins and axles are the way to interchange between these.

  • Thank you for the confirmation. Definitely makes it a worthwhile investment. Mar 21, 2012 at 13:32
  • No probs. Yes it's definitely a good investment :) Mar 21, 2012 at 14:02
  • You should note however that Power Function motors and accessories that can be found in large TECHNIC sets won't work with Mindstorms without the addition of (expensive) adapters.
    – Shadocko
    Sep 21, 2015 at 16:01

Mindstorms is essentially Technic and Lego parts with electronic components built in to them. So the answer is yes.


There are two sides to this, building and electrics.

In terms of building yes, mindstorms can be seen as an extension of Technic and most of the Elements in a mindstorms set will be "Technic" elements. The old RCX was orientated towards "old-style" Technic that used a mixture of pins and studs while the newer NXT and EV3 are orientated towards new-style Technic that mostly uses pins.

In terms of Electrics things are more of a mess.

LEGO has had various electric systems over the years, broadly speaking there are.

  1. The 4.5V/12V system, this is ancient and completely incompatible with Mindstorms. This used plugs with two pins, sometimes with a central bump.
  2. The "electric system 9V", inroduced in 1990 and used for motorising many Technic sets. Also used by the RCX. This used contacts built into the top of lego studs.
  3. The NXT/EV3 system this uses a RJ style connector but with the clip in a different position from normal.
  4. The "Power functions" system, introduced in 2007 and has now mostly replaced the "electric system 9V". This uses a custom connector with two lego studs and a custom contact block next to them that is roughly 1x2 but won't stack with lego bricks.
  5. The "powered up" system, the newest system from Lego. Sometimes also reffered to as "power functions 2.0".

Lego sold an adapter cable to go from the NXT to "electric system 9V" part number 8528. Unfortunately it is no longer sold. They also sell two different lengths of extension/adapter cables which can be used either to extend power functions or to connect power functions to "electric system 9V" part numbers 8886 and 8871.

It seems that Lego never made an adapter to go directly from the NXT to power functions though you can connect the NXT to power functions motors by combining the two adapters above or by splicing cables to make your own adapter.

Also it seems that the EV3 is not really compatible with the Lego adapter cable, apparently sensors won't work at all and motors will only work with special software hacks. There is discussion of this and possible workarounds with custom cables at How to use Power Functions with Mindstorms EV3? and Use legacy RCX sensors with EV3

The powered up system seems to have no compatibility with anything else at least not using official parts. Lego don't even sell an extension cable that can be hacked into, I've seen some third party ones but they were very expensive.

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