Picture of R/C Lego Car

I like the Lego modular system, especially Lego Technic.

I have a collection of Lego Technic Vehicles, i.e. Road Rally V (8225), Rough Terrain Vehicle (8270), Formula 1 Race Ca r(8808), etc. These small Lego vehicles could be upgraded to use (rare to find!)  Electric Motor Kit (8720) to drive the vehicle.

I want to challenge myself to incorporate Arduino, XBee into my R/C Lego car design.

I want to do something different!

I do not want to buy commercial available toy R/C (Radio-Controlled) car and modify it to used with XBee and Arduino. (I already did that successfully, Processing Controls R/C Car with XBee modules.

I want to do something similar to an NXT or RCX Mindstorm system with my R/C Lego car design (At the moment, I could not afford either NXT or RCX.)

I want to use parts that are available at hand.

So, I end up designed my very own R/C Lego Car by reused the parts from:
- Lego Steering System from 1996 Lego Car Kit (#8207 Dune Duster)
- Motor with worm gear from Electric Dragster from Middlesex University electric science series) ,
- micro servo from my other diy robot.
And built an Arduino compatible with simple motor driver IC (L293D) PCB, with wireless XBee breakout board compatible receptacle.

 And here is how I created it!

Note: See more photos of my R/C Lego and video in Step 10.
DavidS12418 days ago

very cool indeed. love lego hacks

legofreak862 years ago
Hey, Legos are my thing! Great idea,sath02.
sath02 (author)  legofreak862 years ago
I can tell how much you love Lego ;)
Thanks for the compliment!
nfrith2 years ago
Great 'ible sath02! My 8 yo son saw this over my shoulder and put it on his Christmas list. I sourced one of the Lego Technic kits, as well as the 9V Technic Motor kit, all new, all from the '90's (eBay is awesome), and I got all of my Arduino bits from Sparkfun. I will be posting my first 'ible from this. Thanks for the inspiration!
sath02 (author)  nfrith2 years ago
So your son is going to get an early Christmas gift this year! :) Good for him!
Great! Looking forward to seeing your first instructable.
If there is anything I could help, please let me know.

c3ralki1l3r2 years ago
I was think more over to the power functions side but this works too :D
sath02 (author)  c3ralki1l3r2 years ago
This is my first Lego Technic build. I do not have power functions kit. So I used Arduino instead of RCX or NXT, used motor controller IC, and servo with it.
It worked well.
Edgar2 years ago
Good! :)
Gone to the Blog:
sath02 (author)  Edgar2 years ago
Thanks, Edgar.
You're so kind!
Edgar sath022 years ago
Well, I like sharing good stuff. :)
JonnyBGood2 years ago
This is really cool! Can I use an old RC car for the electronic components?
sath02 (author)  JonnyBGood2 years ago
I can not give you "Yes" or "No" to your question! It could be either one, it depends.

My R/C Lego Car only used the rear motor and the worm gear with enclosure from old electric dragster kit that did not have the front steering system. I have to used the existing Lego steering system from an old Lego Car Kit. This was easy enough, since I only did the modification to the motor from the electric dragster kit.

If you want to use the old R/C chassis or frame without modification, then build Lego bricks and beams around or on top of the old R/C chassis or frame. Then add Arduino & XBee and use Processing to control it. If that what in your mind, please look at my instructable:

If you don't care about your old R/C car any more, you could cut out the front steering system and rear motor with the gear train. Then builds Lego bricks and beams as the frame (like I did), and modify both the front steering system, and rear motor driving system, by doing something similar to Step 7 in this instructable, to fit the Lego frame and both front steering and rear driving system together.

Hope this answer your question.
jiansy2 years ago
i have to give you props for making a cool idea come alive. this along with the mindstorm bots is probably the most advanced vehicle made from legos on the site. i hope that this section will move away from those droll minifigs and move up to stuff like the more complex technic vehicles.
sath02 (author)  jiansy2 years ago
Thanks for the kind words.
I am hoping to see other Lego enthusiasts out there build thier own R/C Lego, and may be we can have a race!
That would be fun, wouldn't it?