# LEGO 9735-1 — Robotics Discovery Set (1999)

Source: https://www.brickmissing.com/sets/9735-1-robotics-discovery-set
Publisher: BrickMissing (https://www.brickmissing.com) — free LEGO parts checker. Not affiliated with the LEGO Group.

LEGO RCX 9735-1 Robotics Discovery Set focuses on Robotics Discovery Set as a buildable character or creature. Recognition comes from pose, face, silhouette and details that carry the subject's personality. That gives the model presence on the shelf.

## Set facts

- Set number: 9735-1
- Name: Robotics Discovery Set
- Theme: Mindstorms › 1.0
- Released: 1999
- Pieces: 390
- Distinct part + colour lots: 109
- Build difficulty: intermediate
- Repairability: 7.3% of this set's lots are hard to replace (8 of 109 part+colour combinations appear in three or fewer sets in the entire LEGO catalog).

## Complete parts list (109 lots, 390 pieces)

Prices are the official LEGO Pick a Brick price per individual part, where LEGO publishes one.

| Qty | Part | Colour | Part no. | LEGO element ID | LEGO price each |
| ---: | --- | --- | --- | --- | --- |
| 4 | Tile 1 x 4 with Groove | Light Gray | 2431 | 243102 | — |
| 2 | Wedge Plate 3 x 3 Cut Corner | Light Bluish Gray | 2450 | 6529282 | €0,12 |
| 2 | Brick 2 x 6 | Black | 2456 | 4181139 | €0,29 |
| 4 | Tile Special 1 x 1 with Clip and Straight Tips | Black | 2555 | 255526 | — |
| 4 | Brick Round Corner 4 x 4 Full Brick | Black | 2577 | 257723 | — |
| 2 | Plate Round 2 x 2 with Rounded Bottom [Boat Stud] | Black | 2654 | 4278359 | €0,07 |
| 4 | Technic Brick 1 x 10 [9 Pin Holes] | Black | 2730 | 273023 | — |
| 13 | Technic Pin with Friction Ridges Lengthwise and Center Slots | Black | 2780 | 278026 | — |
| 2 | Technic Beam 1 x 4 Thin with Stud Connector | Light Gray | 2825 | 282502 | — |
| 2 | Technic Engine Crankshaft Center | Light Gray | 2854 | 285402 | — |
| 10 | Brick 2 x 4 | Black | 3001 | 300123 | €0,22 |
| 2 | Brick 2 x 2 | Black | 3003 | 300323 | €0,13 |
| 16 | Brick 1 x 2 | Black | 3004 | 300423 | €0,11 |
| 2 | Dome Hemisphere 4 x 4 Multifaceted | Trans-Neon Green | 30208 | 4114690 | — |
| 2 | Plate Special 1 x 2 with 4 x 4 disk at 90 degrees | Black | 30209 | 4114691 | — |
| 2 | Plate 2 x 2 | Light Gray | 3022 | 302202 | — |
| 14 | Plate 1 x 2 | Light Gray | 3023 | 302302 | — |
| 1 | Wing Insectoid Large with Arm Hinge and Circuitry Print Left (Print on Top, Tip on Left, Logo at Back Edge) | Trans-Dark Blue | 30230pr0001 | 4114643 | — |
| 1 | Wing Insectoid Large with Arm Hinge and Circuitry Print Right (Print on Top, Tip on Right, Logo at Back Edge) | Trans-Dark Blue | 30230pr0002 | 4114642 | — |
| 2 | Plate 6 x 10 | Light Gray | 3033 | 303302 | — |
| 4 | Slope 45° 2 x 1 with Bottom Pin | Light Gray | 3040b | 304002 | — |
| 2 | Tile 2 x 2 with Groove | Red | 3068b | 6273853 | €0,07 |
| 2 | Tile 1 x 2 with Groove | Light Gray | 3069b | 306902 | — |
| 1 | Technic Brick 1 x 2 [2 Pin Holes] | Light Gray | 32000 | 3200002 | — |
| 6 | Technic Plate 2 x 6 [5 Holes] | Light Gray | 32001 | 3200102 | — |
| 8 | Technic Pin 3/4 | Dark Gray | 32002 | 4109854 | — |
| 2 | Technic Beam 1 x 11.5 Double Bent Thick | Purple | 32009 | 4112277 | — |
| 4 | Technic Axle and Pin Connector Angled #1 | Black | 32013 | 6332570 | €0,08 |
| 2 | Technic Axle and Pin Connector Angled #6 - 90° | Black | 32014 | 4112205 | — |
| 2 | Technic Axle and Pin Connector Angled #5 - 112.5° | Light Gray | 32015 | 4106378 | — |
| 4 | Technic Axle and Pin Connector Angled #3 - 157.5? | Black | 32016 | 6261397 | €0,13 |
| 4 | Technic Beam 1 x 5 Thin | Light Gray | 32017 | 4106885 | — |
| 4 | Plate Special 1 x 2 with Door Rail | Light Gray | 32028 | 4109642 | — |
| 4 | Technic Axle Connector with Axle Hole | Light Gray | 32039 | 4106469 | — |
| 8 | Technic Pin Long with Friction Ridges Lengthwise and Stop Bush [3 Lateral Holes, Big Pin Hole] | Red | 32054 | 4111958 | — |
| 4 | Technic Axle 2 Notched | Black | 32062 | 4109810 | €0,07 |
| 2 | Technic Brick 1 x 2 with Axle Hole Type 1 [+ Opening] and Bottom Pin | Red | 32064a | 4112290 | — |
| 2 | Technic Axle 5 | Black | 32073 | 4114740 | — |
| 1 | Launcher, Technic Competition Cannon, Round Bottom with Black Ends | Red | 32074c02 | 4114735 | — |
| 1 | Hub, Scout Brick [Complete Assembly] | Black | 32104c01 | 4141010 | — |
| 8 | Technic Bush 1/2 Smooth with Axle Hole Reduced | Tan | 32123a | 4206210 | — |
| 2 | Plate 1 x 8 | Light Gray | 3460 | 346002 | — |
| 2 | Wheel with Split Axle hole | Red | 3482 | 4121847 | — |
| 4 | Plate 1 x 3 | Light Gray | 3623 | 362302 | — |
| 2 | Tyre 43 x 17 | Black | 3634 | 363426 | — |
| 4 | Technic Gear 8 Tooth | Light Gray | 3647 | 364702 | — |
| 2 | Technic Gear 24 Tooth [New Style with Single Axle Hole] | Light Gray | 3648b | 364802 | — |
| 4 | Technic Gear 40 Tooth | Light Gray | 3649 | 364902 | — |
| 2 | Technic Gear 24 Tooth Crown with Reinforcements [New Style] | Light Gray | 3650c | 365002 | — |
| 2 | Plate 1 x 6 | Light Gray | 3666 | 366602 | — |
| 12 | Technic Pin without Friction Ridges Lengthwise | Light Gray | 3673 | 367302 | — |
| 8 | Technic Brick 1 x 2 [1 Pin Hole] | Black | 3700 | 370023 | €0,12 |
| 4 | Technic Brick 1 x 4 [3 Pin Holes] | Black | 3701 | 370123 | €0,17 |
| 2 | Technic Brick 1 x 8 [7 Pin Holes] | Black | 3702 | 370223 | — |
| 6 | Technic Brick 1 x 16 [15 Pin Holes] | Black | 3703 | 370323 | — |
| 2 | Technic Axle 4 | Black | 3705 | 370526 | €0,08 |
| 2 | Technic Axle 6 | Black | 3706 | 370626 | €0,12 |
| 2 | Technic Axle 8 | Black | 3707 | 370726 | €0,22 |
| 2 | Technic Axle 12 | Black | 3708 | 370826 | €0,27 |
| 4 | Technic Plate 2 x 4 [3 Holes] | Light Gray | 3709 | 370902 | — |
| 2 | Technic Plate 2 x 4 [3 Holes] | Purple | 3709 | 4118908 | — |
| 4 | Plate 1 x 4 | Light Gray | 3710 | 371002 | — |
| 2 | Plate 1 x 4 | Yellow | 3710 | 371024 | €0,12 |
| 6 | Plate 1 x 4 | Red | 3710 | 6350418 | €0,12 |
| 20 | Technic Bush | Light Gray | 3713 | 371302 | — |
| 2 | Technic Axle 10 | Black | 3737 | 373726 | €0,25 |
| 6 | Technic Plate 2 x 8 [7 Holes] | Light Gray | 3738 | 373802 | — |
| 2 | Slope Inverted 33° 3 x 2 [Connections between Studs] | Reddish Brown | 3747b | 4508616 | €0,21 |
| 8 | Technic Axle Pin without Friction Ridges Lengthwise | Light Gray | 3749 | 374902 | — |
| 2 | Plate 2 x 10 | Light Gray | 3832 | 383202 | — |
| 8 | Technic Brick 1 x 6 [5 Pin Holes] | Black | 3894 | 389423 | €0,29 |
| 2 | Technic Brick 1 x 12 [11 Pin Holes] | Black | 3895 | 389523 | €0,54 |
| 2 | Hinge Brick 1 x 2 Base | Black | 3937 | 393726 | €0,10 |
| 2 | Hinge Brick 1 x 2 Top Plate Thin | Black | 3938 | 393826 | €0,10 |
| 4 | Brick Round 2 x 2 with Axle Hole | Black | 3941 | 614323 | €0,11 |
| 2 | Dish 4 x 4 Inverted [Radar] | White | 3960 | 396001 | €0,24 |
| 2 | Technic Gear 16 Tooth with Round Holes [Old Style] | Light Gray | 4019 | 401902 | — |
| 2 | Plate Round 2 x 2 with Axle Hole Type 1 (+ Opening) | White | 4032a | 403201 | €0,06 |
| 2 | Tile 1 x 8 with Groove | Light Gray | 4162 | 416202 | — |
| 4 | Technic Pin 1/2 | Light Gray | 4274 | 427402 | — |
| 2 | Slope 33° 3 x 1 | Yellow | 4286 | 428624 | €0,10 |
| 2 | Plate 1 x 10 | Light Gray | 4477 | 447702 | — |
| 2 | Technic Axle 3 | Black | 4519 | 451926 | — |
| 2 | Dish 2 x 2 Inverted [Radar] | White | 4740 | 474001 | €0,05 |
| 2 | Wire with Brick 2 x 2 x 2/3 Pair, 20L | Black | 5306bc020 | 4100355 | — |
| 2 | Wire with Brick 2 x 2 x 2/3 Pair, 36L | Black | 5306bc036 | 75652 | — |
| 2 | Arm Piece with Pin, 2 Fingers | Black | 6048a | 604826 | — |
| 3 | Plate Round 1 x 1 with Solid Stud | Black | 6141 | 614123 | €0,05 |
| 3 | Plate Round 1 x 1 with Solid Stud | Light Gray | 6141 | 614102 | — |
| 6 | Technic Axle and Pin Connector Perpendicular | Light Gray | 6536 | 4173667 | — |
| 4 | Technic Axle Connector Ridged [with x Hole x Orientation] | Light Gray | 6538b | 4100408 | — |
| 4 | Technic Brick 1 x 1 with Pin Hole | Black | 6541 | 4119014 | €0,07 |
| 2 | Technic Axle 1.5 with Perpendicular Axle Connector (Technic Pole Reverser Handle) | Light Gray | 6553 | 655302 | — |
| 2 | Technic Pin Long with Friction Ridges Lengthwise, 2 Center Slots | Black | 6558 | 655826 | — |
| 2 | Technic Cam | Light Gray | 6575 | 657502 | — |
| 2 | Tyre 20 x 30 Balloon Medium 49.6 x 20 | Black | 6581 | 658126 | — |
| 2 | Wheel 20 x 30 Balloon Medium | Red | 6582 | 4121846 | — |
| 2 | Technic Axle 3 with Stud | Dark Gray | 6587 | 4113884 | — |
| 2 | Technic Beam 1 x 9 Bent (6 - 4) Thick | Red | 6629 | 4112285 | — |
| 4 | Technic Beam 1 x 3 Thin | Light Gray | 6632 | 4107825 | — |
| 2 | Motor, 9V Mini [Old Style] | Light Gray | 71427c01 | 4107786 | — |
| 4 | Rubber Band Small 13mm (Square Cross Section) | Black | 71509 | 4107153 | — |
| 2 | Ball 41mm | Yellow | 72048 | 4112928 | — |
| 2 | Hose Rigid 3mm D. 16L / 12.8cm | Yellow | 75c16 | 4116948 | — |
| 2 | Hose Rigid 3mm D. 36L / 28.8cm | Red | 75c36 | 4116939 | — |
| 2 | Hose Rigid 3mm D. 44L / 35.2cm | Yellow | 75c44 | — | — |
| 2 | Technic Gear 24 Tooth Clutch with Dark Gray or Light Gray Center | White | 76019 | 4270486 | — |
| 2 | Projectile, Technic Competition Arrow, Beam Shaft with Solid Black Rubber End | Yellow | 76110c01 | 4114419 | — |
| 2 | Sensor, Touch | Light Gray | 879 | 4107716 | — |

## Notes

- Track which of these parts you own and see what is missing: https://www.brickmissing.com/sets/9735-1-robotics-discovery-set
- Inventory data is based on official LEGO inventories via the Rebrickable catalog, updated daily.
- Part images, minifigure lists and related sets are on the set page: https://www.brickmissing.com/sets/9735-1-robotics-discovery-set