LEGO Robo Technology Set (Serial Cable)
Set #9785 · 2003 · 221 pieces · Moderate build
Set Details
- Set Number
- 9785
- Name
- Robo Technology Set (Serial Cable)
- Theme
- Mindstorms
- Year
- 2003
- Pieces
- 221
- Complexity
- Moderate
- Build Time
- 1-2 hours
- Ages
- 8+
- Type
- Educational
About LEGO Robo Technology Set (Serial Cable)
LEGO Robo Technology Set (Serial Cable) (set #9785) is a mid-sized build with 221 pieces from the Mindstorms theme, released in 2003. The Mindstorms line features programmable robotics kits combining bricks with sensors and motors. This is a moderate-level build suitable for ages 8+, with an estimated build time of 1-2 hours.
Set Highlights
- 221 pieces at moderate complexity — a 1-2 hours build.
- Compatible with all standard LEGO sets — bricks extend naturally into other sets you own.
- Play-focused build with interactive elements designed for 8+ builders.
Who Is This Set For?
Gift for Ages 8+
The moderate difficulty makes this accessible without being trivial — a well-matched gift for LEGO fans in the 8+ age range.
Weekend Build Project
221 pieces with an estimated 1-2 hours fits comfortably into a focused afternoon or weekend session.
Expanding a Mindstorms Collection
A solid addition for collectors building out their Mindstorms shelf. Introduces parts and builds that complement other sets from the same line.
Build Tips
Check the piece count on the bag against the parts list before starting — knowing what you have prevents mid-build surprises.
Even in small sets, connection order matters. Follow the steps rather than building sections independently.
Keep the instruction booklet after building — it's the most reliable reference for disassembly, cleaning, or reassembly after storage.
Finding Instructions
Building instructions for LEGO Robo Technology Set (Serial Cable) (#9785) are available as a free PDF on LEGO.com. You can also upload a photo of this set to LegoFinder to identify it and access the instructions directly.
Robo Technology Set (Serial Cable) FAQ
Related Reading
More Mindstorms Sets
See all Mindstorms →![LEGO Robo Technology Set [USB Cable]](https://cdn.rebrickable.com/media/sets/9786-1.jpg)
![LEGO ROBOLAB Team Challenge Set Version 2.5 [USB]](https://cdn.rebrickable.com/media/sets/9794-1.jpg)
![LEGO ROBOLAB Team Challenge Set Version 2.5 [Serial Transmitter]](https://cdn.rebrickable.com/media/sets/9793-1.jpg)
Also Released in 2003
All 2003 sets →Similar Build Difficulty
Sets at roughly the same piece count and complexity tier — different theme and year, but a similar build experience.
Need Instructions for Robo Technology Set (Serial Cable)?
Upload a photo of your LEGO Robo Technology Set (Serial Cable) set and get the building instructions PDF in seconds.
Upload a Photo Now