Lego + Raspberry Pi: Explore Robotics in a Fun Way

The Raspberry Pi Foundation partnered with the LEGO Group to bring us the Build HAT (hardware attached on top) last year and still I’m not convinced that many Raspberry Pi lovers know about this partnership.

Growing up my parents worked for a company that made Lego bricks and they would bring home garbage bags of random bricks for me to build (almost) endless creations. Add in some Micro Machines and my weekend was covered!

Honestly, I’m really excited for kids today. With the right combination of Lego and technology there’s a tonne of fun learning to be had (especially with a focus on more S.T.E.M. based learning than ever before).

The Build HAT connects directly onto the Raspberry Pi GPIO pins to ensure a solder-free install. As well, you’ll notice a power input and four connector ports for motors and sensors. From there it’s up to your imagination what Lego creations you build next.

What you’ll need to get started

• Raspberry Pi (if you don’t already have one consider picking up a Raspberry Pi 4)
• Build HAT – You can pick this up at most Raspberry Pi accessory retailers
• Spike Lego Education Set – Includes 528 bricks and a booklet with 29 different lessons
• Python3 (installation requires only two commands)
• If you’re not confident in your Python coding skills consider using EduBlocks to take advantage of a block programming with Python (similar to what MIT’s Scratch)
• Raspberry Pi OS (or any ARM-based OS that is capable of running on the Pi)
• Build HAT libraries (excellent documentation on installation and getting started)

You’ll also need a power brick (pun intended) to power the Build HAT and Raspberry Pi. You may purchase a power adapter from the Raspberry Pi Foundation directly or use your own with the same specs.

Allow me to share some of my favourite projects that will get your creative circuits flowing!

Robot buggy controlled by Bluetooth

This project will aid you in controlling a remote controlled buggy via Bluetooth using your Android Smartphone. At the end of the process you’ll be controlling two separate drive wheels to manoeuvre in a variety of directions with only your finger. Perhaps you’ll challenge yourself to add blinkers, brake lights, and a horn sound effect?

Game Controller

Ready for some intense head-to-head gaming? Try creating a game controller for your retro favourites!

This guide will help you to install required libraries and includes python code that is needed to move motors, as well as making your Pong game come alive (paddle collisions too!).

Data Dashboard

Perhaps capturing pollution data using physical dials and sliders is more your style? This demonstration will challenge your critical thinking skills using API retrieval methods to pull interesting data using Python. You will also be able to measure NO2 and fine particle levels within a chosen location. Will you be inspired to create real-time weather updates including cloud cover and what clothing is suitable to wear?

When you’re ready to take your skills to the next level the Lego Spike expansion set comes with large wheels, gear tracks, colour sensors, motors, and more. This 600+ brick set pairs with the free SPIKE App for hours of learning too.

Regardless of the recommended age ranges that accompany these products, I feel that we’re never too old to learn. Why not share what you’re working on? We could all use a little inspiration!