Self Guided LEGO Vehicles
Hey everyone. Jason here.
A few weeks ago my local LUG set up a LEGO display at the Ottawa Train Expo, and I was challenged by one of the other members to build a self-guided LEGO vehicle to drive through the layout, and today I’m going to show you what I did. It’s actually extremely simple.
It all comes down to the power of… magnets. First, let’s take a look at the vehicles.
I designed both of these OC Transpo buses around this basic frame, which i think is
about as small as you can get using stock Power Functions components. Here we have a battery box and an M motor With a belt drive to transfer power
to one of the rear wheels. For steering, we basically just have this run of the mill… steering system with the addition of
this bar connected to one of these old 9V
train coupling magnets. So as the vehicle drives on the road plates,
the magnet slides along surface following a wire that is taped underneath. For wire I’m just using some old picture wire I had around the house.
I taped a section of it underneath each of the base plates.
Which you can see here. A curve and a straight.
And this just makes it easy to transport and setup, and configure the loop however you like.
So that’s about all there is to it. If you’re interested in building something
like this yourself I have posted instructions for how to build the frame on the website, along with more detailed
information on how it all works. I hope you enjoyed the video.
Keep on building, and we’ll see you next time.