HP Robots | Otto Top modules

The Top Modules are where Otto shows personality, expression, and extra functionality. Sitting above the Middle and Bottom layers, the top section is the perfect place to mount lights, sensors, hats, and decorative elements that make your robot stand out.

Whether you want Otto to glow, sense, wear a fun hat, or simply look awesome, these top modules give you endless ways to customize and expand your robot.

🧩 What You’ll Find Here

A collection of tops, hats, and complementary attachments** designed to snap onto the Otto Starter system.

🔺 Tops

• Snap directly onto the middle or bottom modules

• Serve as Otto’s head and main mounting point for:

  • LED rings

  • Lights & diffusers

  • Sensors (light, gesture, environmental, etc.)

• Provide structure for hats and decorative add‑ons

• Available in multiple shapes for different robot styles

🎩 Hats

• Decorative accessories that screw onto the tops

• Optional magnet‑friendly designs for quick swapping

• Add personality: helmets, caps, crowns, themed hats, and more

• Great for events, holidays, competitions, or character design

🔧 Functional Attachments

• Mounts for additional electronics

• Light diffusers, sensor housings, and special‑purpose tops

• Fully compatible with the Otto Starter modular ecosystem

All parts are modular, remix‑friendly, and stackable, giving you total freedom to design Otto’s look and capabilities.

🧠 Part of the Otto Starter Modularity

The Otto system is built around three printable layers:

• Top → hats, lights, sensors, personality

• Middle → faces, displays, electronics, expansion

• Bottom → wheels, bumpers, arms, movement

These Top Modules expand the first layer, letting you customize Otto’s head, style, and functional add‑ons.

If you haven’t printed the main Starter Kit yet, you can find them here:

🖨 Print Instructions

• Material: PLA or similar

• No supports, rafts, or brims needed

• Layer height: 0.2 mm or less

• Perimeters: minimum 3

• Infill: 15% or more

💡 Tips

• Use tops with LED‑ring mounts for glowing effects

• Top_lightsHats.stl/.step as a base for your hat designs. Use one screw to hold most cantered hat designs or you could embed magnets too!

• Add hats to give Otto personality for events or themes

• Try sensor‑compatible tops to expand robot capabilities

• Remix your own designs—we love featuring community creations

🌍 Join the Community

Share your builds and remixes using #ottodiy and join the global Otto Builder community of educators, makers, and robot enthusiasts.