How many pieces does the LEGO Robo Technology Set (Serial Cable) (9785-1) have?

The LEGO Robo Technology Set (Serial Cable) set (9785-1) contains 221 pieces. It was released in 2003 as part of the LEGO Mindstorms theme.

How can I find missing parts for LEGO set 9785-1?

On BrickMissing you can check which parts from the LEGO Robo Technology Set (Serial Cable) (9785-1) you already own. Add your LEGO collection and we'll show exactly which of the 221 pieces you're missing and which you already have.

Can I build the LEGO Robo Technology Set (Serial Cable) with parts I already have?

Use BrickMissing's free parts checker to find out. Add LEGO sets you own to your collection and we'll cross-reference all 221 parts to show your buildability percentage and which specific pieces you still need.

What theme is the LEGO Robo Technology Set (Serial Cable) from?

The LEGO Robo Technology Set (Serial Cable) (9785-1) belongs to the LEGO Mindstorms theme. You can browse all Mindstorms sets on BrickMissing to find more sets from this theme.

Robo Technology Set (Serial Cable)

🏷️ 9785-1•🎨 Mindstorms•📅 2003•🧱 221 parts•Easy

Robo Technology Set (Serial Cable) (9785-1) is a LEGO Mindstorms from 2003. This page uses the available set and theme data until a fuller product description is available.

Parts Inventory

🧱 221 parts

Part	Color	Qty
Plate Round 2 x 2 with Rounded Bottom [Boat Stud] 2654	Black	2×
Technic Pin with Friction Ridges Lengthwise and Center Slots 2780	Black	12×
Technic Wedge Belt Wheel Tire 2815	Black	2×
Tyre 81.6 x 15 Motorcycle 2902	Black	2×
Wheel 61.6 x 13.6 Motorcycle 2903	White	2×
Sensor, Light with Fixed Cable 2982c01	Black	1×
Brick 2 x 4 3001	Red	6×
Brick 2 x 2 3003	Yellow	6×
Dome Hemisphere 4 x 4 Multifaceted 30208	Trans-Neon Green	2×
Plate 1 x 2 3023	Black	8×

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Sensor, Light with Fixed Cable	2982c01	Black	1×
Brick 2 x 4	3001	Red	6×
Brick 2 x 2	3003	Yellow	6×
Dome Hemisphere 4 x 4 Multifaceted	30208	Trans-Neon Green	2×
Plate 1 x 2	3023	Black	8×
Plate 6 x 12	3028	Red	2×
Technic Plate 2 x 6 [5 Holes]	32001	Black	4×
Technic Pin 3/4	32002	Dark Gray	8×
Technic Axle Connector with Axle Hole	32039	Light Gray	2×
Technic Axle 2 Notched	32062	Black	4×
Technic Brick 1 x 2 with Axle Hole Type 2 [X Opening]	32064b	Light Bluish Gray	4×
Technic Axle 5	32073	Light Gray	2×
Technic Bush 1/2 Smooth with Axle Hole Reduced	32123a	Tan	8×
Technic Beam 3 x 5 L-Shape with Quarter Ellipse Thin	32250	Black	2×
Plate 1 x 8	3460	Black	2×
Wheel with Split Axle hole	3482	Yellow	4×
Tyre Offset Tread 24 x 8	3483	Black	2×
Tyre 43 x 17	3634	Black	2×
Technic Gear 8 Tooth	3647	Light Gray	3×
Technic Gear 24 Tooth [New Style with Single Axle Hole]	3648b	Red	2×
Technic Gear 40 Tooth	3649	Light Bluish Gray	2×
Technic Pin without Friction Ridges Lengthwise	3673	Light Gray	12×
Technic Brick 1 x 2 [1 Pin Hole]	3700	Black	4×
Technic Brick 1 x 4 [3 Pin Holes]	3701	Black	4×
Technic Brick 1 x 16 [15 Pin Holes]	3703	Black	2×
Technic Brick 1 x 16 [15 Pin Holes]	3703	Black	2×
Technic Axle 4	3705	Black	2×
Technic Axle 6	3706	Black	2×
Technic Axle 8	3707	Black	2×
Technic Axle 12	3708	Black	2×
Technic Plate 2 x 4 [3 Holes]	3709	Yellow	4×
Technic Bush	3713	Light Gray	20×
Technic Axle 10	3737	Black	2×
Technic Plate 2 x 8 [7 Holes]	3738	Yellow	4×
Technic Axle Pin without Friction Ridges Lengthwise	3749	Tan	8×
Plate 2 x 10	3832	Light Gray	2×
Technic Brick 1 x 6 [5 Pin Holes]	3894	Black	4×
Technic Brick 1 x 12 [11 Pin Holes]	3895	Black	2×
Hair, Smooth	3901	Brown	1×
Bracket 2 x 2 - 2 x 2	3956	Black	2×
Technic Wedge Belt Wheel [aka Pulley]	4185	Yellow	2×
Technic Pin 1/2	4274	Light Gray	4×
Technic Axle 3	4519	Light Gray	2×
TRAINING MISSION ACTIVITY PAD	45533	Black	1×
Wire with Brick 2 x 2 x 2/3 Pair, 20L	5306bc020	Black	3×
Wire with Brick 2 x 2 x 2/3 Pair, 36L	5306bc036	Black	3×
Light Brick 1 x 2 with Single Side Light	6035	White	1×
Hair Ponytail	6093	Black	1×
Technic Axle and Pin Connector Perpendicular	6536	Light Gray	2×
Technic Axle Connector Ridged [with x Hole x Orientation]	6538b	Light Gray	2×
Technic Axle 1.5 with Perpendicular Axle Connector (Technic Pole Reverser Handle)	6553	Light Gray	4×
Technic Axle 3 with Stud	6587	Dark Gray	2×
Storage Bin Lid, Dacta, 19 x 24	71082	Trans-Clear	1×
Motor, 9V Mini [Old Style]	71427c01	Light Gray	2×
Cable, Serial, for IR Transmitter Tower	71793	Light Gray	1×
Transmitter Tower, IR, Serial with Black Front	76091	Dark Gray	1×
Hose, Ribbed 7mm D. 12L / 9.6cm	78c12	Purple	2×
Technic Rubber Belt 24mm	85544	Red	4×
Sensor, Touch	879	Light Gray	2×
Hub, RCX 2.0, No Power Jack [Complete Assembly]	884c	Yellow	1×
Hips and Blue Legs	970c28	Black	1×
Torso, White Arms, Yellow Hands [Plain]	973c27h01	White	1×
Storage Bin, Dacta, Medium	upn0038	Bright Green	1×

Build DNA

Parts inventory insights for Robo Technology Set (Serial Cable)

221 pieces puts this build -54% against the average Mindstorms set and -9% against the average 2003 release.

LEGOMINDSTORMS

Vs average Mindstorms set

-54%-255 parts

This set221

Average set476

Average Mindstorms set: 476 pieces across 33 other sets.

Vs average 2003 set

-9%-23 parts

This set221

Average set244

Average 2003 set: 244 pieces across 235 other sets.

Color profile

15different colors

Dominant color

Black

Black82x

37%

Light Gray60x

27%

Yellow21x

10%

Tan16x

Unique parts

3.3 pieces per unique type

Repeat factor

Average pieces per unique type.

Most used part

Technic Bush

20x

Results are based on official LEGO part inventories. Accuracy improves as you confirm set completeness.

This site is not affiliated with or endorsed by the LEGO Group.

Build Insights🧩67unique parts🎨15different colors📊14.7avg. parts per color🏆20×Technic Bush

🎨 All Mindstorms sets 📅 All sets from 2003

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