Picture of Wireless Lego Race Car
Lego Bricks are great to use as a sketch tool. I can build a mock up, then tear it down. I can create different designs, if it didn't worked I can tear them down and rebuild another model without wasting anything. Or I would build two models at the same time and compare them side by side, and see which one will work better.

This instructable shows you how I used Lego Bricks and components to design Lego Race Car.

My Lego Race Car using different wheels sizes for the front and rear. My Lego Race Car did not have front wing flap, similar to some  Formula 1 race cars in 1960s. 

This Lego Race Car did not used all Lego's parts. I built this one the same way I built my R/C Lego Car. A small servo was used as the turning mechanism. And I used motor and gearbox with axle that I took out from small R/C car.

When I first started building this car. I thought of using XBee module to wirelessly receive commands from PC or Laptop. (See test video in Step 13). After I finished the car I thought of using RN-XV WiFly module to receive commands from my iPod touch.

The reason to use iPod Touch (4G) as a remote control device instead of using the laptop or PC to control the car. Since the iPod Touch (or iPhone) is so small that I can hold in my hand(s), I could move around to follow the car instead of sitting at the same place with a laptop sit on my lap.

Here is how I created this Wireless Lego Race Car.


sahirbray8 months ago
What's is the distance it can go with you stationary?
nfrith2 years ago
Very cool. You've improved significantly on the previous design, and the mobile integration is excellent.
sath02 (author)  nfrith2 years ago
Thanks for your kind words.
Looking forward to see the one you are building for your son.
nfrith sath021 year ago

Finally got the 'ible up for mine http://www.instructables.com/id/Lego-Technic-Car-with-Arduino-XBee-Wireless-Contro/, crude but efficient.

I see you've been rather busy :)

xujiaqiang1 year ago
seem that your RN-XV do not run in AP mode, so RN-XV have to join a wifi network, also there must be a web server runing apache and php in the network, all these bring great limitation. Now I have a similar project that RN_XV create a wifi network to which mobile devices can join, they exchange data with tcp protocol, no server needed.
rch52 years ago
very well !
sath02 (author)  rch52 years ago
MarkML2 years ago
sath02 (author)  MarkML2 years ago
Thanks! :)
thebluebulk2 years ago
very kewl! i <3 legos
sath02 (author)  thebluebulk2 years ago
Thanks :)
onrust2 years ago
Nicely done. Not to mention that car is just sexy!
sath02 (author)  onrust2 years ago
Thanks :)
JonnyBGood2 years ago
Cooler than the last one. I like the more aerodynamic look, which reminds me of a formula one car.
sath02 (author)  JonnyBGood2 years ago
You got it, Johnny! Yes, my intention was to make it look like F1 car.
Alright! I still haven't got around to making one yet, but there hasn't been any rc cars I've felt like disassembling either...
J-Five2 years ago
Pure genius!!!
sath02 (author)  J-Five2 years ago
WWC2 years ago
Excelent as usual
sath02 (author)  WWC2 years ago
rubiksqub2 years ago
wow! Great job!
sath02 (author)  rubiksqub2 years ago