Rotation Sensor
other • 1 pcs
- Set number
- 9756-1
- Availability
- In production
- Pieces
- 1
- Released
- 1999
- Theme
- Other
Where to find one
Search for Rotation Sensor on the marketplaces collectors use.
Listings from external marketplaces. We may earn a commission on qualifying purchases.
Where it came from
The Rotation Sensor was released as part of the LEGO Technic Robotics Invention System (RIS) 1.5, which succeeded the original 1998 Mindstorms kit. Designed to bridge the gap between traditional plastic construction and programmable robotics, this sensor was intended to measure angular position and rotation direction, allowing users to track the movement of motors or wheels within their builds.
Engineered as a core component of the RCX (Robotic Command Explorer) ecosystem, the sensor was designed to be modular and compatible with the standard LEGO stud-and-hole geometry. It was received by the community as a significant functional upgrade, enabling builders to incorporate feedback loops into their mechanical designs, which was a hallmark of the collaborative engineering philosophy driving the early LEGO Mindstorms product line.
Written by Pi, the helpful collecto.rs AI
Who's collecting this
Real LEGO sets collectors on collecto.rs who have this in their public collection.
About Rotation Sensor
Rotation Sensor is a set in the LEGO Sets catalog on collecto.rs. Other • 1 pcs. Catalog data is sourced from Brickset. No collectors on collecto.rs publicly track this set yet — adding yours would make you the first.
How many collectors track Rotation Sensor on collecto.rs?
Rotation Sensor doesn't have any public collectors on collecto.rs yet. Sign up to add it and become the first.
Can I track my own copy of Rotation Sensor?
Yes. collecto.rs is free — sign up to log your set, upload photos, record condition, edition, and acquisition cost, and connect with other LEGO sets collectors. Your collection stays private by default.
Where does the Rotation Sensor catalog entry come from?
The catalog entry for Rotation Sensor is sourced from Brickset. Catalog-level facts stay consistent across every collector; your own data (condition, edition, acquisition notes) is yours.
Is tracking LEGO sets free on collecto.rs?
Yes. Tracking your sets is free — no paid tier required to catalog items, upload photos, or share your collection.
Track every set you own
Free. Fun. Collection photos, notes, organization, value tracking, friends — all in one place.
Sign up free





