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Robotics Invention System, Version 1.5 (9747-1) is a RCX LEGO set released in 1999 with 731 pieces. Browse the parts list, minifigures, and verify loose bricks with our free scanner. Collectors browsing RCX sets use this inventory to verify loose parts, compare color variants, and read official build manuals without downloading PDFs. This set includes 145 unique part types.
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Parts in this set
145 parts · page 1 of 4 · updating…
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Arm Grab Jaw4221 · ×4 · Black -
Arm Grab Jaw Holder, 3 Fingers4220 · ×2 · Yellow -
Arm Piece with Pin, 2 Fingers6048a · ×2 · Black -
Bracket 2 x 2 - 2 x 23956 · ×2 · Light Gray -
Brick 1 x 23004 · ×4 · Yellow -
Brick 1 x 23004 · ×20 · Black -
Brick 2 x 23003 · ×20 · Black -
Brick 2 x 43001 · ×5 · Black -
Brick Round 2 x 2 with Axle Hole3941 · ×8 · Black -
Brick Separator v1.06007 · ×1 · Dark Gray -
Cable, Serial, for IR Transmitter Tower71793 · ×1 · Light Gray -
![CD-Rom, for 9747 [RIS v1.5]](https://cdn.rebrickable.com/media/parts/photos/9999/bb1240-9999-6ec0f9f0-1e27-4b99-bb29-852b910e9114.jpg)
CD-Rom, for 9747 [RIS v1.5]upn0134 · ×1 · [No Color/Any Color] -
![Cone 1 x 1 [No Top Groove]](https://cdn.rebrickable.com/media/parts/elements/458924.jpg)
Cone 1 x 1 [No Top Groove]4589 · ×2 · Yellow -
![Cone 1 x 1 [No Top Groove]](https://cdn.rebrickable.com/media/parts/elements/458901.jpg)
Cone 1 x 1 [No Top Groove]4589 · ×2 · White -
Creature Body Part, Dragon Wing6133 · ×2 · Trans-Neon Orange -
![Dish 4 x 4 Inverted [Radar]](https://cdn.rebrickable.com/media/parts/elements/396001.jpg)
Dish 4 x 4 Inverted [Radar]3960 · ×2 · White -
![Hinge Plate 1 x 2 with 3 Fingers [Hollow Studs]](https://cdn.rebrickable.com/media/parts/elements/427526.jpg)
Hinge Plate 1 x 2 with 3 Fingers [Hollow Studs]4275b · ×2 · Black -
Hinge Tile 1 x 2 1/2 with 2 Fingers on Top4531 · ×2 · Black -
Hose Rigid 3mm D. 19L / 15.2cm75c19 · ×2 · Yellow -
Hose, Ribbed 7mm D. 12L / 9.6cm78c12 · ×4 · Purple -
Hose, Ribbed 7mm D. 9L / 7.2cm78c09 · ×4 · Black -
Hose, Ribbed 7mm D. 9L / 7.2cm78c09 · ×4 · Dark Turquoise -
![Hub, RCX 1.0, No Power Jack [Complete Assembly]](https://cdn.rebrickable.com/media/parts/photos/14/884b-14-07ff1998-5ed8-48cf-971b-162153984c9b.jpg)
Hub, RCX 1.0, No Power Jack [Complete Assembly]884b · ×1 · Yellow -
Motor Pulley, 9V Micromotor with axle hole2983 · ×2 · Light Gray -
![Motor, 9V Mini [Old Style]](https://cdn.rebrickable.com/media/parts/ldraw/7/71427.png)
Motor, 9V Mini [Old Style]71427c01 · ×2 · Light Gray -
Plate 1 x 13024 · ×8 · Light Gray -
Plate 1 x 104477 · ×6 · Light Gray -
Plate 1 x 23023 · ×20 · Light Gray -
Plate 1 x 33623 · ×2 · Yellow -
Plate 1 x 43710 · ×10 · Light Gray -
Plate 1 x 63666 · ×10 · Light Gray -
Plate 1 x 83460 · ×8 · Light Gray -
Plate 2 x 103832 · ×6 · Light Gray -
Plate 2 x 23022 · ×2 · Green -
Plate 2 x 23022 · ×8 · Light Gray -
Plate 2 x 23022 · ×4 · Blue -
Plate 2 x 2 Corner2420 · ×8 · Light Gray -
Plate 2 x 43020 · ×6 · Yellow -
Plate 2 x 83034 · ×4 · Green -
Plate 6 x 103033 · ×1 · Light Gray -
Plate Round 1 x 1 with Solid Stud6141 · ×3 · Blue -
Plate Round 1 x 1 with Solid Stud6141 · ×3 · White -
Plate Round 1 x 1 with Solid Stud6141 · ×3 · Black -
Plate Round 2 x 2 with Axle Hole Type 1 (+ Opening)4032a · ×2 · Blue -
Plate Round 2 x 2 with Axle Hole Type 1 (+ Opening)4032a · ×2 · White -
![Plate Round 2 x 2 with Rounded Bottom [Boat Stud]](https://cdn.rebrickable.com/media/parts/elements/265426.jpg)
Plate Round 2 x 2 with Rounded Bottom [Boat Stud]2654 · ×2 · Black -
![Plate Special 1 x 1 with Clip Horizontal [Thick U Clip]](https://cdn.rebrickable.com/media/parts/elements/601926.jpg)
Plate Special 1 x 1 with Clip Horizontal [Thick U Clip]6019 · ×2 · Black -
![Plate Special 1 x 1 with Clip Vertical [Thick U Clip]](https://cdn.rebrickable.com/media/parts/elements/408526.jpg)
Plate Special 1 x 1 with Clip Vertical [Thick U Clip]4085c · ×2 · Black