After I built R/C Lego Car, that used hacked motors and motor housings from the toy Car and toy R/C cars. I realized most of the parts from that toy R/C car that I took the motor out of became wasted.
This way was not very practical or not so "green" at all.

So I decided to design a 3D printed motor housing (See details in Step1) that is generic to all of my Lego car designs (details in Step 1). 

This instructable, R/C Lego Car Redux, shows you how to use the 3D printed motor housing with my very first built R/C Lego Car.
Most of the parts from my original R/C Lego Car were still in used in this version. There were also some new Lego parts added, but only a few. 

Eventhough this instructable is a "Redux" of the R/C Lego Car, I am going to show you how to build this car step by step from scratch, just like we tear the model apart and rebuild it again.

One good thing, neither the programming the Arduino, nor the UI to control the car in Processing needed to be changed.

Note: See more photos of "Redux" version of R/C Lego Car and video in Step 12.


LEGO®, TECHNIC, are property of The LEGO Group of Companies (http://www.lego.com), which does not sponsor, own, authorize or endorse this creation.

Step 1: 3D Printed Motor Housing

Why 3D Printed Motor Housing?

I was not very happy and was tired of using hacked motor and motor housing from toy car or toy R/C car, because each time I want to build a different design Lego Cars. Most of the time the new design Lego car that I plan to make was not able to use the previous hacked motor and motor housing.

Now that I created my own 3D printed motor housing. My motor housing for custom LEGO® car can be used over and over, and I do not have to buy toy R/C car to hack for motor housing from it and mod it to fit with my new design Lego car anymore.

This 3D motor housing was designed to have studs (4x6 studs) that compatibles with LEGO® modular system. 
 printed motor housing fits most of DC gear motors (130-Size), standard toy DC motors, with the approximate size of 15x20x25mm (height x width x length) with 2mm shaft diameter.

Photo 1 Screen grabbed from the 123D Design of the finished 3D model of motor housing.

Photo 2, 3 The 3D printed motor housing used in this project was first created in 123D Beta 9, and then migrated to 123D Design, both have the similar functionalities. The 3D printed motor housing was first printed from The Free 3D Printing offer from instructables.com (now closed).

Photo 4, 5, 6 Show the installation of the motor housing on my Wireless Lego Race Car.

Here are the steps I made to create 3D printable motor housing in 123D Design,

Photo 7 Before I migrated from 123D Beta 9 to 123D Design I tried out the 123D Design app. by created 130-Size motor in the 123D Design first.

Photo 8 Then I created 1x4 LEGO Brick.

Photo 9 And then added Primitives, and used Combine tools to form the housing.

Photo 10 And 3D Printing ready model.

Photo 11 I hided the motor model and ready to send to fabricator.

Attached is the STL file, you also can view the model and download the file from Shapeways here.

I like it! Have you thought about entering this into the <a href="http://www.instructables.com/contest/buildingblocks2013/">LEGO Contest</a>?
Thanks! <br>I could try. And thanks for the suggestion. <br>
No It won't get in, because it was posted before the start date of the LEGO Contest.
Rats, I misread the dates. Good luck in the other contests!
This is pretty cool, building an <a href="http://www.nitrotek.it/auto-rc.html" rel="nofollow">Rc Car</a> using Lego, The LEGO set 31006 is a nice on its own, but it also contains some useful parts. Many builders have used these to create another car/vehicle/thing, and this one impressed us the most.
That's cool! you should check out mine. it is completly lego and uses power functions. it is a work in progress. The name is LEGO Fire Falcon with suspension.
Thanks, I'll look at your Fire Falcon!
First time I see the arduino with the lego ;) great design! <br>You could use a blue-tooth transceiver instead of an XBee as its a lot cheaper and kind of easier to use :D
Hi, <br>Thanks. <br>I will keep the bluetooth in mind. May be I will incorporate bluetooth into my next LEGO car! ;)
I'll be waiting for it ;)
nice build up I like this idea. can you share some <a href="http://www.nitrotek.se/" rel="nofollow">link</a> where from I can buy one like this. I am interested in buying one like this.
Hi, <br>Thanks. <br>This LEGO car is a custom design and custom built. You could gather the LEGO components as shown in Step 2 and then build it yourself. You can get LEGO components from various places like eBay (search with key word Lego Technic, Lego), LEGO's shop (http://shop.lego.com/en-US/Pick-A-Brick-ByTheme), or BrickLink.com (https://www.bricklink.com). <br>For the motor housing, It's still under development. If you have your own 3D printer you can download the file and print it. <br>I'm still using this Lego car to test a lot of things. So I could not sell it to you right now. Sorry.

About This Instructable


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Bio: I am Electronic Visualization Artist. I look at things through the Looking Glasses.
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