Hey, I’m James Japhet,

Robot
Wizard

3× Inspire Award winner · FIRST World Championship

Robotics student at SCAD Savannah · Class of ’30

James Japhet at the 2025 Reefscape event wearing a FIRST in Texas button and a team 9444 drive team badge
FRC Team 9444 drive team, Reefscape 2025. Photo: @firstintexas

I design, build and program robots, then document and open-source what I learn.

CAD and design
Mechatronics
Combat robotics
CNC
Laser cutting
Documentation

FIRST highlights

Full FIRST record →

The Inspire Award is the top judged award in FIRST Tech Challenge.

I design, build and program robots, from FIRST competition machines and antweight combat bots to a prosthetic finger and a filament recycler, and I open-source what I learn. My projects go under the name Big Guy Enterprises. I also have substantial documentation experience, so I document what I build.

  • Fusion 360
  • Onshape
  • Java
  • Arduino
  • 3D printing
  • CNC
  • Laser cutting

Big Guy Enterprises

The name my projects go under, and the hub where they live. It started with Big Guy, my antweight combat robot, and now includes the Filacycler filament recycler and free models on Printables.

Projects

Robots, combat bots and things I made because I wanted them. Click a photo to enlarge it.

Megamind

Python · built with Claude · Oct 2026

A tool that turns my projects into social posts. It reads my GitHub repos and Notion workspace, where most of my project records live, groups everything into projects, and drafts a LinkedIn post and an X post for each one.

  • Connectors for GitHub, Notion and websites (sitemap, RSS or page reads). Re-syncing never duplicates items or overwrites my edits
  • An LLM names and summarizes each project, and everything I’ve made is searchable in one database
  • Drafts arrive by email: replying “Y” posts to LinkedIn, “N” asks for a rewrite, and anything else counts as feedback
  • I paste the X version myself, since X’s API needs a paid tier
  • Python and FastAPI on Vercel, with a Postgres database on Neon

Status: built in seven stages, five complete. Next up are a chat panel and imports from Onshape, Fusion and Instagram.

The Filacycler

Aug–Dec 2025 · Big Guy Enterprises

A desktop recycler that turns shredded PLA and PETG into 1.75 mm filament. It is built on a salvaged Ender 3 V2 using only 3D printed and stock Ender parts, with bolts and tapped holes instead of complicated wiring, which is what killed the first attempt.

  • Downward-pushing auger feeding a modified hotend and nozzle
  • Custom miter gears, plus a funnel and fan to manage hotend heat
  • Marlin firmware and custom G-code drive the motors
  • Goal: open-source design, then a purchasable kit for hobbyists, schools and small workshops

Status: every function works. The remaining problem is shredding the plastic fine enough to stop clogs.

The Filacycler: a black desktop recycler with a funnel on top, a wooden filament spool and a touchscreen
The Filacycler.

6th Finger prosthetic

2 versions · open source

An accessible finger prosthetic for people who have lost a finger, or want extra hand function. Version 1 is a string-retraction finger on a Velcro strap. I released it publicly and more than 80 makers built their own.

Version 2 adds a bend-type flex sensor, an Arduino Nano and a servo that mirror the wearer’s finger after a short calibration at startup. The goals stayed the same: affordable, easy to fabricate, minimal electronics.

The 6th Finger prosthetic worn on a hand with a black glove and rubber bands
Worn on the hand.
Close-up of the 6th Finger servo and mount
Servo and mount.
CAD of the 6th Finger
Finger CAD.

Big Guy

Antweight combat robot · V1–V5

A 3D printed combat robot with TPU armor for impact absorption over a rigid PETG internal structure. Across five versions it went from a compact dual-flipper concept to a single-flipper design with taller walls and defined front prongs. The final version has an N20-motor tank drive and a servo-powered flipper.

It started as a hobby build and a school assignment, then became the foundation for Big Guy Enterprises.

Big Guy, a blue and black 3D printed combat robot with a flipper, beside its controller
Big Guy beside its controller.

Jack of All Trades Robotics

Combat robotics · hobby team

My combat robotics team. I compete with David Spade, an antweight, and designed Flapjack, a PLAntweight, and Proud Mary, an antweight big wheel.

The David Spade antweight, its transmitter and the team pit table with a SendCutSend sponsor sign
David Spade at the pit table.
David Spade, a blue 3D printed wedge antweight with a locking-pliers weapon
David Spade.
Mid-development Flapjack CAD with herringbone four wheel drive and wedge prongs
Flapjack mid-development, herringbone 4WD.
CAD of Proud Mary, an antweight with two very large wheels
Proud Mary.

Project P.I.G.

4-DoF arm · open source

Performance Innovative Grabber: a simple, budget-friendly modular robotic arm for learning complex robotic systems. The CAD, bill of materials, code and controller are all public.

CAD of Project P.I.G., a four degree of freedom robotic arm on a round base with three legs
Project P.I.G. in Onshape.

Wall-E Claw Kit

STEM outreach kit · 3D printing + laser cutting

Part of a robotics project to introduce STEM to younger generations: a Wall-E inspired mechanical claw kit. It shows off 3D printing, laser cutting and an active geartrain in one build.

  • 3D printed clips hold it together, so it is easy to mass produce and easy to assemble
  • Laser cut jaws and plates, with 3D printed gears and fasteners
Onshape render of the Wall-E inspired claw kit: two red toothed gears drive two tan jaws from a tan plate held with red bolts
The claw kit in Onshape.

Into the Deep: Solo Run

Browser game

A browser-based robotics simulator built on the FIRST Tech Challenge season Into the Deep. Play it with a controller or keyboard.

FTC robots

Cypher · Squeaker · Railer · Cheesy Jane

Cypher (23350, 2025–26). Our DECODE robot, which competed at the FIRST Central Texas Area Championship and the FIRST World Championship. I partially redesigned the drive pods with feedback lights, hub mounts with wire access, handles and a redesigned battery and power-switch mount. I also designed the servo-driven belted turret and the tilt mechanism, which took six iterations.

Team 23350's yellow and blue Cypher robot on the field beside another team's robot
Cypher on the field.
Close-up of Cypher's tilt mechanism on its yellow side plate
The tilt mechanism.
Cypher driving in front of the blue goal as a ball flies overhead
Shooting at the goal.

Squeaker (22370, 2024–25). A low-profile Into the Deep robot on a 3D printed chassis. Every part modeled in Fusion 360, with a worm-gear pivoting linear slide that cannot backdrive, and a passive claw. Java control with RoadRunner paths and odometry-verified cycles. I was lead designer, builder, programmer and driver. It earned 3rd place Inspire at the FiT Central Semi-Area in Corpus Christi.

James at a laptop on the field floor tuning the Squeaker robot, team number 22370
Tuning Squeaker.
Fusion 360 render of the Squeaker robot with a linear slide and claw
Squeaker in Fusion 360.

Railer (23350). An experimental robot with a coaxial carbon-fiber arm on a 360° turret that sorts aluminum cans with a differential claw. The arm started belt-driven and moved to gears.

CAD of the Railer robot arm on its base
Railer.

Cheesy Jane (23350, 2025–26). A DECODE robot: a high-speed flywheel on a servo-driven turret, an active intake and a modular pass-through indexing tunnel. I designed the turret and indexing system.

CAD of the Cheesy Jane robot with a turret and mecanum wheels
Cheesy Jane.

VEX U robot

CAD · no team yet

I planned to start a VEX U team and couldn’t get it off the ground, but I designed most of the robot in CAD anyway.

CAD of the VEX U robot with a tall telescoping lift and a claw
Lift and claw.
CAD of the VEX U robot drivetrain, intake and launcher
Drivetrain and intake.
Rear view of the VEX U robot CAD with two lift columns
Rear.
Top-down CAD of the VEX U robot with four mecanum wheels
Top view.

C4 Edition

With Lily M. · Aug 16–30

A faster, more chaotic Connect 4. A mechanical coin sorter separates colors, one servo ejects through a linkage and gear train, and a move timer keeps both players and the audience on edge. Electronics are an Arduino Nano, a button, an LCD and a servo. It is mostly 3D printed, with simple shapes designed with injection molding in mind.

CAD of the C4 Edition Connect 4 rack with seven yellow columns, a servo and a gear train
C4 Edition CAD.

This website

HTML, CSS and JS · Vercel

The site you are on: a single-page site with no framework, hosted on Vercel and deployed from GitHub on every push.

MATH 140 course map

School project · DIGI 230 team map

An interactive map of one unit of MATH 140, The Geometry of Physical Space, showing where an AI hint tool belongs in the class and where it does not. It includes a working proof-hint tool. A team project for DIGI 230, hosted on Vercel.

easy-belt

Open source · web tool

A belt and pulley CAD generator, hosted as a free web tool.

easy-step

Open source · web tool

A STL to STEP converter that runs in the browser.

E3CNC

Open source

CAM for an Ender 3 CNC conversion.

Gestalt-Lens

Open source

A Gestalt design principle analyzer.

Custom guitars

Three builds

Three guitars built from body kits, each one more customized than the last: alpha natural, bravo blue, and charlie copper, which has a hand-carved body and custom pickguard. They were where I learned electrical and mechanical basics for instruments.

Alpha, the natural finish guitar
Alpha, natural.
Bravo, the blue guitar
Bravo, blue.
Charlie, the copper guitar
Charlie, copper.

FIRST Robotics

Six seasons across FRC and FTC, from rookie to the World Championship, plus a season mentoring younger teams.

  1. Control Award#20739 · CENTERSTAGE
  2. Rookie InspirationFRC #9444
  3. Inspire · 3rd#22370 · Corpus Christi
  4. Rising All-StarFRC #9444
  5. Inspire · 1st#23350 · League
  6. Inspire · 2nd#23350 · Regional
  7. World Championship#23350 · DECODE
May 2025 – Jun 2026
FTC · Mechanical design engineer

#23350 Microchips & Queso

DECODE season. I designed the servo-driven belted turret, improved the modular drivetrain pods with lights and visual feedback, added a compact kickstand for endgame, stabilized the mounts for control systems and batteries, added transport handles and designed the yellow camera mount. I was also the alliance’s human player for most matches.

Inspire Award, 1st — League Tournament Inspire Award, 2nd — Regional Championship Winning Alliance Captain — League Tournament FIRST World Championship
Team 23350's yellow and blue DECODE robot beside its Central Regional Championship Inspire 2nd place trophy
Cypher, the 23350 DECODE robot. Photo: @microchipsandqueso
James as human player holding a purple ball over the field
Human player. Photo: @firstintexas
James at graduation holding a FIRST Tech Challenge Microchips and Queso 23350 alumni banner
2026 alumni.
2024 – 2026
FRC · Build and programming

#9444

I competed from Crescendo through part of Rebuilt, and left the team during the Rebuilt season. I built and programmed robots, including the Java teleop base for the Rebuilt robot, which finished as the 5th alliance captain. I also restored a broken-down chassis into a rideable robot, then built and programmed it.

Rookie Inspiration Award — FIT District San Antonio, 2024 Rising All-Star Award — FIT District San Antonio, 2025
James taking a selfie next to a half-built robot drivetrain with motors and wiring
Rookie season, Crescendo.
A robot mid-assembly with a tall arm, NEO motors and wiring
A robot mid-assembly.
A rideable robot: a school chair strapped to a chassis with a wooden deck
The rideable robot, half finished.
Collage of the Rebuilt robot carrying yellow balls
The Rebuilt robot.
Aug 2024 – May 2025
FTC · Robotics engineer

#22370 The Covenant

Into the Deep season. Team lead on a three-person team: CAD, code, driving and documentation. We aimed to show that a low-budget team can compete using 3D printing. See Squeaker above.

3rd Place Inspire Award — FiT Central Semi-Area, Corpus Christi (2024–25)
The 2024–2025 FiT Central Semi-Area Corpus Christi Inspire Award 3rd place trophy
Inspire 3rd place.
Two team members in safety vests working at a laptop in the pit
In the pit.
James explaining the 22370 robot to judges
Judging.
Dec 2023 – Jun 2024
FTC · Robotics engineer

#20739 Pixelated

CENTERSTAGE season. CAD engineer, 3D printing and robot building. The Control Award and the semifinals win came at the same events.

Control Award Winning Alliance Partner — Semifinals
Team 20739's robot with a long arm gripping a green and a purple pixel
Pixelated 20739 robot with its arm extended.
The 20739 robot lifting pixels toward the backdrop
Scoring on the backdrop.
Aug 2025 – Mar 2026
FTC · Mentor

Mentor to #22370, #20739 and #27524

Taught CAD, electronics and technical skills to students in grades 6–12 across three sister teams.

Open source

Everything I can share, I share: code, CAD and bills of materials.

Free models, shared widely

Printables7,500+ downloads · 1,000+ likes · 50+ models
MakerWorld5,000+ downloads · 1.5K likes · 3K model prints

Community service

45.5 verified volunteer hours across four organizations, from a food bank kitchen to a robotics camp.

Verified hours
45.5
Organizations
4
Hours with the San Antonio Food Bank
17
Hours at Cornerstone Christian Schools
20
Jul 2022 – Apr 2023
17 hours · 4 shifts

San Antonio Food Bank

  • Community Kitchen at Haven for Hope: food prep, meal service and dining area cleanup (12 hours over two Saturdays).
  • Warehouse sorting (2.5 hours).
  • Community Farm & Garden (2.5 hours).
Dec 2022
3.5 hours

Winter Wonderland Community Event

Set up and took down the event at the Tobin Recreation Center and handed out hats and gloves.

Aug 2024 – Apr 2025
20 hours

Cornerstone Christian Schools

  • Science lab upkeep: cleanup, organization, kits, maintenance, building shelves and mentoring (16 hours).
  • Classroom furniture assembly (4 hours).
May 2025
5 hours

Makers of the Future

Volunteered at a robotics camp.

Hours come from signed service project forms, San Antonio Food Bank proof-of-service letters and a volunteer-hours memo. Copies of the original documentation are available on request.

Contact

Big Guy Enterprises

Questions about my projects.

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Personal

Everything else.

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