We absolutely LOVE the new LEGO Star Wars sets that have come out over the last couple of years. They’re well designed, fun to build, and look great. What would make them even more fun is if they also moved on their own!
We took an off the shelf LEGO BB-8 set and automated it so the head spins around! Even better, we added sound effects and lighting effects! But if that isn’t enough we also added a motion sensor so that it would activate when someone walks by. Overall this project isn’t overly difficult to do, but does take awhile and requires a healthy amount of random Technic LEGO parts to built the gear box area.
Step 1: Parts Needed
LEGO BB-8 Set
Worm Gear Drive Set
Large Technic Gear
Technic 1×4 Brick x 4 (or 8)
Technic 1×8 Brick x 4
2×8 Plates x 4
Step 2: Video Guide
We made up a Step by Step video to show off what the BB-8 can do and how to make it.
Step 3: Build Your BB-8
Seriously though, kudos to LEGO for putting together a really darn nice project. The rubber band head wobble, the little welding arm, and the attention to detail is just fantastic.
Step 4: Remove the Head Control
Put inside half of the axel back in if it comes out.
Put that section to the side as you’ll need it later.
Step 5: Construct the Base Adaptors
Remove all the extra parts on the bottom of your BB-8. You want to leave the bottom white area completely flat.
Connect your white bricks UPSIDE DOWN to your black technic bricks.
We ended up using two of the 1×4 bricks per adaptor for extra strength, but it’s probably not necessary.
Step 6: Connect Adaptors and Plates
If possible, use some 2×8 plates to increase the footprint and connection area.
As mentioned before, we also added in a second 1×4 brick to be on the safe side.
Step 7: Attach to Base Plate
Give yourself some space in the front and a lot of space in the back in order for the rest of your parts.
Make sure the empty “gear area” is pointed towards the BACK of your project. We need space for the gearing and electronics.
Step 8: Remove the Spinner
Grab a long size 12 or better axle and attach it to the connector inside the BB-8.
Reattach the entire side.
Step 9: Add Spacers and a Large Gear
You’ll need to attach a couple of different sized spacers before attaching your large Technic Gear.
We also added a small bushing to the end of our axle to hold everything tightly in place.
Read more: Automated LEGO BB-8!