HP Robots | Otto Building Bricks Compatibility

These adapters unlock a whole new world of creativity by making HP Robots Otto fully compatible with LEGO Technic beams, pins, gears, and track systems. With these parts, you can transform your Otto Starter robot into tracked explorers, crawlers, articulated vehicles, and hybrid mechanisms that combine 3D‑printed parts with the versatility of Technic building.

Designed for the Otto Starter + Invent expansion, these adapters snap onto the robot’s modular structure and allow you to integrate Technic elements securely and creatively.

🧩 What You Can Build

These adapters let you combine Otto’s electronics and servos with LEGO Technic mechanics to create:

• Tracked robots using Technic treads

• Crawler mechanisms with articulated arms or legs

• Hybrid vehicles mixing 3D‑printed frames with Technic beams

• Gear‑driven systems powered by Otto’s servos

• Custom STEM challenges for classrooms and workshops

If you can build it in Technic, you can now mount it on Otto.

🔧 How It Works

The set includes connection adapters that:

• Attach directly to the Otto Starter body

• Provide Technic‑compatible holes for pins, axles, and beams

• Allow secure mounting of tracks, wheels, arms, and gearboxes

• Maintain full compatibility with the Invent expansion

• Keep the robot modular, swappable, and remix‑friendly

This makes it easy to prototype new mechanisms or extend Otto’s mobility beyond wheels.

🧠 Part of the Otto Modular Ecosystem

These adapters integrate seamlessly with the Otto system:

• Bottom modules → wheels, bumpers, arms

• Middle modules → faces, displays, sensors

• Top modules → hats, lights, accessories

• Technic adapters → mechanical expansion & advanced builds

Together, they turn Otto into a flexible robotics platform for makers, educators, and students.

Buy all necessary hardware parts in a convenient kit here👈 

🖨 Print Instructions

(From the original model page)

• Material: PLA or similar

• Temperature: PLA ~ 215 °C | PETG ~ 240 °C

• Layer height: 0.2 mm or less

• Perimeters: minimum 3

• Infill: 15% or more

• No supports, rafts, or brims needed

💡 Tips

• Use Technic tracks to build rugged explorers

• Combine beams and gears for articulated crawlers

• Add Invent expansion servos for more movement

• Remix your own adapters—we love featuring community creations

🌍 Join the Community

❤ Like and share, and join our friendly global community of robot builders, educators, and makers. Join today our Otto Builder community