How many pieces are in the LEGO Interface?

LEGO Interface contains 4 pieces.

When was the LEGO Interface released?

LEGO Interface was released in 1986.

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No. 9750

Technic

LEGO Interface

The LEGO Interface 9750-1 is a pivotal piece of LEGO history.

Time on the shelf Retired

Released Jan 1986

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Before you buy

Who it's for: Beginner build Ideal for collectors and those interested in the history of LEGO Technic and robotics.
Build: 4 pieces · about 1 hours Build time is an estimate.
Availability: Likely retired

★★★★☆ 4.2 AI-generated review score, not a customer rating

Collectors appreciate this set for its historical importance and the opportunity it provides to explore early LEGO robotics. The primary criticism revolves around its limited functionality compared to modern LEGO robotics offerings.

📝 Our Take

The LEGO Interface 9750-1 is a pivotal piece of LEGO history. Released in 1986, this set allowed builders to connect their LEGO creations to early computer systems, marking a significant step towards integrating technology with the classic building experience. It's a rare glimpse into the early days of LEGO robotics.

This set is perfect for LEGO history buffs and Technic collectors. While the set itself is small, its historical significance and rarity make it a prized addition to any serious collection. It offers a unique opportunity to explore the roots of LEGO's engagement with computer technology.

Skip this if you're looking for a modern building experience or complex model. The Interface is primarily a functional component rather than a display piece. Consider modern LEGO Mindstorms sets for robotics projects.

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🧱 Building Experience

🧩

Pieces

⏱

1.0h

Estimated Build Time

📊

Beginner

Difficulty

Build Highlights:

Simple connection to 4.5V Technic motors
Introduction to computer-controlled LEGO models
Historical insight into LEGO's technological evolution
Early example of LEGO's integration with computer systems

⚖ Compare Similar Sets

The LEGO Interface 9750-1 is unlike any modern set, serving a specific function in the early days of LEGO Technic. Modern LEGO Mindstorms sets offer far more advanced robotics capabilities, but lack the historical charm and rarity of this Interface. Collectors interested in the history of LEGO and its technological evolution may prefer the Interface, while those seeking modern robotics functionality should opt for Mindstorms.

📦 Parts Inventory

Piece count: 4
Parts cataloged in this inventory: 4 unique parts, 4 pieces

Missing a piece? Check this set piece by piece, with look-alike colors flagged and element IDs for replacements.

The value of this set lies in the complete Interface system, including the rare Interface box and cable. The included transformer is also a key component for collectors seeking to restore vintage LEGO electronic systems.

🛒 Where to Buy

eBay

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💎 Notable Parts

Light Gray Cable, Technic Control 4.5V Interface (1x)

Black Technic Control 4.5V Interface Box with Ports (1x)

Black Electric Adapter / Transformer, 7V AC - 1.6 amp (1x)

💡 MOC Potential

🤖 Explore early robotics concepts with vintage Technic parts

🚗 Integrate computer control into classic LEGO vehicles

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Inventory Statistics

Inventory version 1

4 Unique Parts

4 Piece Count

4 Cataloged Inventory Pieces

0 Minifigures

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