731
Robotics Invention System, Version 1.5
Reference: #9747 · released in 1999
Themes: Mindstorms › RCX
The LEGO Robotics Invention System, Version 1.5 set came out in 1999 in the Mindstorms theme. This construction set holds 731 parts. It represents a programmable robotics system with motors and sensors.
This set from LEGO includes a total of 731 parts distributed across 145 distinct unique parts.
Set parts (145)
![Hub, RCX 1.0, No Power Jack [Complete Assembly]](https://static.toytrust.app/brands/img/lego/elements/884b/14.jpg)
![Plate Round 2 x 2 with Rounded Bottom [Boat Stud]](https://static.toytrust.app/brands/img/lego/elements/2654/0.jpg)
![Technic Brick 1 x 10 [9 Pin Holes]](https://static.toytrust.app/brands/img/lego/elements/2730/0.jpg)
![Technic Gear 24 Tooth [New Style with Single Axle Hole]](https://static.toytrust.app/brands/img/lego/elements/3648b/7.jpg)
![Technic Gear 24 Tooth Crown with Reinforcements [New Style]](https://static.toytrust.app/brands/img/lego/elements/3650c/7.jpg)
![Technic Brick 1 x 2 [1 Pin Hole]](https://static.toytrust.app/brands/img/lego/elements/3700/0.jpg)
![Technic Brick 1 x 2 [1 Pin Hole]](https://static.toytrust.app/brands/img/lego/elements/3700/14.jpg)
![Technic Brick 1 x 4 [3 Pin Holes]](https://static.toytrust.app/brands/img/lego/elements/3701/0.jpg)
![Technic Brick 1 x 4 [3 Pin Holes]](https://static.toytrust.app/brands/img/lego/elements/3701/2.jpg)
![Technic Brick 1 x 8 [7 Pin Holes]](https://static.toytrust.app/brands/img/lego/elements/3702/0.jpg)
![Technic Brick 1 x 16 [15 Pin Holes]](https://static.toytrust.app/brands/img/lego/elements/3703/0.jpg)
![Technic Plate 2 x 4 [3 Holes]](https://static.toytrust.app/brands/img/lego/elements/3709/7.jpg)
![Technic Plate 2 x 8 [7 Holes]](https://static.toytrust.app/brands/img/lego/elements/3738/7.jpg)
![Technic Brick 1 x 6 [5 Pin Holes]](https://static.toytrust.app/brands/img/lego/elements/3894/0.jpg)
![Technic Brick 1 x 12 [11 Pin Holes]](https://static.toytrust.app/brands/img/lego/elements/3895/0.jpg)
![Dish 4 x 4 Inverted [Radar]](https://static.toytrust.app/brands/img/lego/elements/3960/15.jpg)
![Technic Gear 16 Tooth with Round Holes [Old Style]](https://static.toytrust.app/brands/img/lego/elements/4019/7.png)
![Plate Special 1 x 1 with Clip Vertical [Thick U Clip]](https://static.toytrust.app/brands/img/lego/elements/4085c/0.jpg)
![Technic Wedge Belt Wheel [aka Pulley]](https://static.toytrust.app/brands/img/lego/elements/4185/7.jpg)
![Hinge Plate 1 x 2 with 3 Fingers [Hollow Studs]](https://static.toytrust.app/brands/img/lego/elements/4275b/0.jpg)
![Cone 1 x 1 [No Top Groove]](https://static.toytrust.app/brands/img/lego/elements/4589/14.jpg)
![Cone 1 x 1 [No Top Groove]](https://static.toytrust.app/brands/img/lego/elements/4589/15.jpg)
![Plate Special 1 x 1 with Clip Horizontal [Thick U Clip]](https://static.toytrust.app/brands/img/lego/elements/6019/0.jpg)
![Technic Axle Connector Ridged [with x Hole x Orientation]](https://static.toytrust.app/brands/img/lego/elements/6538b/7.jpg)
![Technic Plate 2 x 6 [5 Holes]](https://static.toytrust.app/brands/img/lego/elements/32001/7.jpg)
![Technic Pin Long with Friction Ridges Lengthwise and Stop Bush [3 Lateral Holes, Big Pin Hole]](https://static.toytrust.app/brands/img/lego/elements/32054/1.jpg)
![Technic Brick 1 x 2 with Axle Hole Type 1 [+ Opening] and Bottom Ridges](https://static.toytrust.app/brands/img/lego/elements/32064c/2.png)
![Tread Large, Technic [34 Links]](https://static.toytrust.app/brands/img/lego/elements/71372/0.png)
![Motor, 9V Mini [Old Style]](https://static.toytrust.app/brands/img/lego/elements/71427c01/7.png)
![Rubber Belt Small [15mm ID] [Round Cross Section]](https://static.toytrust.app/brands/img/lego/elements/85543/15.jpg)
![Technic Rubber Belt Medium [26mm ID] [Round Cross Section]](https://static.toytrust.app/brands/img/lego/elements/85545/1.jpg)
![Technic Rubber Belt Large [33mm ID] [Round Cross Section]](https://static.toytrust.app/brands/img/lego/elements/85546/14.jpg)
![Playmat, Test Mat for Mindstorms Robotics Invention System [v1.5]](https://static.toytrust.app/brands/img/lego/elements/4127972/9999.jpg)
![CD-Rom, for 9747 [RIS v1.5]](https://static.toytrust.app/brands/img/lego/elements/upn0134/9999.jpg)
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