10 Inspiring Johnny 5 LEGO MOCs: Instructions, Tips and Ideas

10 Inspiring Johnny 5 LEGO MOCs: Instructions, Tips and Ideas

LEGO MOCs Inspirational Ideas: Johnny 5 

If you’re a child of the ’80s (or just an appreciator of expressive robots), Johnny 5 is pure LEGO MOC gold. With those darting binocular eyes, tank treads, flexible neck, and endless “input!” energy, the SAINT robot from Short Circuit gives builders a perfect playground for character, motion, and personality. Unlike many pop-culture mechs that hide behind armor, Johnny 5’s body is all about exposed mechanisms—pistons, hoses, struts, and panels—making him ideal for Technic linkages and clever SNOT surface work. Even better, his proportions are friendly to multiple scales: micro “Easter egg” versions for a city layout, minifig-scale companions for your sci-fi shelves, and full RC Technic builds that scoot across the floor yelling “No disassemble!”

When planning your own Johnny 5, think in layers. Start with the tracked base and a narrow “waist” that allows a dramatic body lean. Build a sturdy shoulder frame, then add modular arms with wrist and finger articulation (pin joiners and bar/clip combos are your friends). For the head, capture his character through eye flaps and eyelid angles—small changes there totally change his mood. Finally, consider options for an accessory backpack: a laser tool, a toolkit, or a swappable “SAINT mode” pack if you want the pre-awakening look. Whether you go full Powered Up/Mindstorms with remote control or keep it static with expressive posing, Johnny 5 rewards experimentation and detail—exactly the kind of MOC that evolves as you tinker.

Tips for Building Johnny 5

  • Lock the spine. Use liftarms + turntables/linear actuators so the torso can tilt without wobble.

  • Expressive eyes = instant character. Hinge plates or small panels as “eyelids” create emotions with minimal parts.

  • Tracks that behave. If you lack tread links, fake the silhouette with small wheels/tiles; hide the trick behind side panels.

  • Hands that grip. Mix bars/clips and small Technic connectors for poseable fingers; add a simple “thumb” for tool holding.

  • Modularity wins. Build the base, torso, head, and arms as submodules so upgrades (lights, new tools) are easy later.

  • Light it up. Simple LEDs behind transparent round tiles make the optics pop—especially for photo shoots.

Ideas for Types of Johnny 5 MOCs

  • Micro Easter Egg: 15–30 parts for hiding in a city scene or winter village.

  • Minifig Companion: 100–400 parts, simple articulation, perched on a dolly wheel.

  • Technic RC Hero: Full tracks, torso tilt, eye flaps, Powered Up control profiles.

  • Alternate-Build Challenge: Recreate Johnny 5 using only parts from a single set (Technic bulldozer, BOOST, SPIKE, etc.).

  • Scene Dioramas: Library “need input” vignette, construction-site cameo, or final-act “gold” tribute using pearl/yellow mixes.

  • SAINT Variant: Military pre-awakening look with helmet/gear as a swap pack.


Johnny 5 MOCs – Models, Designers, and Instruction Links

RJ’s Lego Johnny 5. 

Model: RJ’s Lego Johnny 5
Designer: RJBrickBuilds
Get the instructions: Model: RJ’s Lego Johnny 5 — Designer: RJBrickBuilds


Johnny 5 – J5moc – Johnny5Moc. 

Model: Johnny 5 – J5moc – Johnny5Moc
Designer: charavision
Get the instructions: Model: Johnny 5 – J5moc – Johnny5Moc — Designer: charavision. (Rebrickable)


Johnny 5 – Short Circuit. 

Model: Johnny 5 – Short Circuit
Designer: jameshigson0512
Get the instructions: Model: Johnny 5 – Short Circuit — Designer: jameshigson0512


Johnny Five. 

Model: Johnny Five
Designer: msx
Get the instructions: Model: Johnny Five — Designer: msx


Johnny 5 from “Short Circuit” (minifig scale). 

Model: Johnny 5 from 'Short Circuit' (minifig scale)
Designer: DoubleBU
Get the instructions: Model: Johnny 5 from ‘Short Circuit’ (minifig scale) — Designer: DoubleBU


LEGO BOOST Johnny 5 (from Short Circuit). 

Model: LEGO BOOST Johnny 5 (from Short Circuit)
Designer: rowanandliam
Get the instructions: Model: LEGO BOOST Johnny 5 (from Short Circuit) — Designer: rowanandliam


Waller Customs Johnny 5. 

Model: Waller Customs Johnny 5
Designer: BrentWaller
Get the instructions: Model: Waller Customs Johnny 5 — Designer: BrentWaller


Johny 5 Mindsorms. 

Model: Johny 5 Mindsorms
Designer: iwogla
Get the instructions: Model: Johny 5 Mindsorms — Designer: iwogla


42163 Johnny 5. 

Model: 42163 Johnny 5
Designer: artemisovsky
Get the instructions: Model: 42163 Johnny 5 — Designer: artemisovsky.


SPIKE 5. 

Model: SPIKE 5
Designer: Tcm0
Get the instructions: Model: SPIKE 5 — Designer: Tcm0.



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