Stefan Fieguth
Engineering Portfolio

Stefan
Fieguth

Systems Design Engineering · University of Waterloo

Mechanical Design 3D Printing PCB & Electrical Woodworking CNC & Machining

I'm a hands-on engineering student who turns ideas into reality, from flame-weeding tractor implements to glowing periodic tables and 500-part scale models. I bridge mechanical design, electronics, and fabrication to build things that work.

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Marvel's Stormbreaker Axe Head, Modelled as Laser-Cut Bent Sheet-Metal

About Me

I'm a third-year Systems Design Engineering student at the University of Waterloo, building a foundation in design-for-manufacturing, electronics, and electromechanical problem-solving. This portfolio highlights my experiences across mechanical systems, electronics, and prototyping.

Through three co-op terms at Werkr Tractors, I led the design of a flame-weeding implement, designed my first PCB, rebuilt their website, designed a new implement installing crane, and redesigned the tractor's rollbar for flat-pack shipping. At Accelerated Systems Inc., I diagnosed electric motors, designed waterproof motor controllers, and converted golf carts to electric drive.

Summers at Silver Lake Mennonite Camp keep me grounded, counselling kids, fixing buildings, and pursuing projects like a detailed 3D-printed scale model of the entire camp and an automatic campfire starting system.

My motivation comes from the intersection of functionality and craft. Whether it's a PCB that needs to be debuggable, a rollbar that must ship flat, or a periodic table that excites students about chemistry, I always start from real-world constraints and objectives, and work toward elegant solutions.

I speak English and German fluently, with working proficiency in French. In my free time, I enjoy 3D printing, Ultimate Frisbee, Soccer, and Pyrotechnics.

Key Skills

Mechanical

  • MIG & TIG Welding
  • CNC Milling & Turning
  • Manual Milling & Turning
  • Laser Cutting
  • Sheet Metal Design

CAD

  • Onshape
  • SolidWorks + FEA
  • Blender (Artistic)
  • Design for Mfg.
  • Design for 3D Print

3D Printing

  • FDM (Bambu Lab X1C)
  • Scale Modelling
  • Functional Parts
  • Artistic Modelling
  • Multi-part Assemblies

Electrical

  • PCB Design (EDA)
  • Circuit Design
  • Arduino (IDE)
  • Wiring Harnesses
  • Soldering

Woodworking

  • Fine Woodworking
  • Wood Turning
  • CNC Routing
  • Epoxy Finishing
  • Quick Prototyping

Other

  • Website Design (Wix)
  • Marketing Video/Photo
  • English & German (Fluent)
  • French (Working)
  • Standard First Aid CPR-C

Explore Projects

Mechanical

Flame weeders, cranes, rollbars, machined parts

3D Printing

Summer camp maps, scale models, functional prints, artistic prints

Electrical

PCB design, Arduino LEDs, motor controllers

Woodworking

CNC routing, lathe turning, fine finishing

3D CAD · Laser Cutting · Welding · Machining · FEA

Mechanical Engineering

Design-for-manufacturing, fabrication, and real-world implementation, from sheet metal and MIG welding to FEA-validated structural components.

Flame-Weeding Tractor Implement

Novel mechanical design for weed control on small-scale farms · Werkr Tractors Co-op · 2025

3D CADLaser CuttingMachiningArduinoDesign for Manufacturing
CAD Model

CAD Model

Underside

Underside View

On Tractor

Attached to Tractor

In Action

In Action

Designed from scratch to eliminate young weeds before planted seeds germinate. Centered on design-for-manufacturing: minimize welding, maximize bent sheet metal, reduce both cost and complexity.

A forklift propane tank feeds 6 individual burners. Each has a spark plug and coil controlled by Arduino for continuous ignition. Stainless steel heat shields contain flame, increasing efficiency and travel speed.

As the first prototype, outer shields were given additional bolt holes to keep all shields identical, reducing laser-cutting error and cost. A project I personally initiated and led from concept through field testing.

Electric Tractor Implement Crane

Prototyping and Design for Manufacturing · Werkr Tractors Co-op · 2026

3D CADLaser CuttingMIG WeldingFEA
CAD

CAD Design

FEA

FEA Stress Analysis

Finished

Finished Product

Installed

Zinc-Plated & Installed

After observing how difficult implement swaps were, I designed a front crane allowing a single operator to lift, swing, and hook up implements far more quickly. This was inspired by the Tilmor tractor design.

Built from bent laser-cut sheet metal and MIG-welded, this design was considerably cheaper than metal tubing. A large center cutout reduces weight. A rope-and-crank system handles loads up to 250 lbs.

An FEA study in SolidWorks validated structural integrity before fabrication. The finished crane was zinc-plated for corrosion and rust protection.

Electric Tractor Rollbar

Safety structure, roof mount, and antenna housing · Werkr Tractors Co-op · 2026

3D CADLaser Cutting3D Printing
Rollbar CAD

Rollbar CAD

In Context

In Context on Tractor

Protects the driver, supports the roof, and mounts antennas at the tractor's highest point. Originally designed in metal tubing, I redesigned it with laser-cut bent sheet metal to allow flat-pack shipping, not possible with the welded original.

Three main structural tubes were retained; everything else is laser-cut and subsequently nut-and-bolt assembled. A 3D-printed antenna and WiFi router housing at the rear uses balls and springs to rotate and clear low overhangs, a passive safety mechanism.

Winning Beam Optimization Design Competition

Designing the Highest Strength-to-Weight Ratio Beam · University Class Competition

SolidWorks CADFEAMachiningWeldingFDM Printing
Beam Design Failures

Beam Design Failures

Final Design

Final Beam Design

On Tractor

Beam Testing Calibration

In Action

Beam Testing Rig

This was a competition in our Materials of Deformable Solids (MODs) class, where we designed, used FEA, and tested beams aimed at producing ones with the highest strength-to-weight ratio, with certain size constraints. We won this competition by achieving the highest ratio of 71,000 times the beam's own weight.

After learning that the university's testing equipment was off limits, we decided to build our own testing rig. We designed and welded it out of metal tubing, then used force meters on wrenches for overall estimates before our final design was officially tested with the university's equipment. Our design also needed an incredibly rigid material, thus we used Bambu Lab's PPA-CF Engineering Filament.

After printing and testing numerous beams with 9 different overarching designs, we landed on our final one. This final beam hit all the sizing constraints and took advantage of the fact that the testing rig had angled supports to hold the beam. This meant we could match the beam's lower geometry to match it, converting nearly all the force into compression.

General Machined Parts

Pizza Axe
Welding

Pizza Axe

A highly useful pizza axe to simultaneously cut a whole pizza into 8 slices with a strong whack!

Adapter Plate
Milling

Adapter Plate

Manually-milled mounting plate demonstrating various slots and holes.

Motor Shaft
Turning

Motor Shaft

Turned motor shaft with precise shoulder and thread dimensions, produced on a manual lathe with CNC capabilities.

Gearbox Plate
CNC Milling

Gearbox Plate

CNC milled gearbox mounting plate with precise recessed pockets and hole patterns.

Quick Hitch
TIG Welding

Quick Hitch

TIG-welded quick hitch assembly demonstrating structural fabrication.

3D CAD · FDM Printing · Scale Modelling · Artistic Design

3D Printing

Years of whimsical, functional, and artistic modelling; specializing in small, detailed models with high printability, strength, and reliability.

Summer Camp Map / 3D Scale Model

Half-year passion project totalling around 500 individual printed parts · Personal Project for Silver Lake Mennonite Camp

Onshape CADFDM PrintingCNC RoutingSolderingWoodworking
Camp Map Overview

Full Camp Map Overview

Wash House

Wash House & Dining Hall

Night Lights

Night View with LEDs

A half-year passion project helping campers and retreat groups understand the layout of Silver Lake Mennonite Camp. Every structure was individually modelled to scale in Onshape and printed on a Bambu Lab X1C. Everything from large buildings, to small ball bins and kayaks was included.

The model consists of nearly 500 printed parts, epoxied lake surfaces, and CNC-routed paths (Scienci LongMill). Buildings lit at night in real life have individual LEDs mounted inside, switchable as a group. Mini campfires light up giving the model an added ambiance.

Managing a complex multi-part assembly, coordinating dozens of unique print settings, and integrating wiring throughout, all while maintaining visual accuracy and structural integrity.

Periodic Table of Elements

120 uniquely designed element boxes · Art piece and learning tool · Personal Project

Onshape CADBlenderFDM PrintingWoodworkingArduino
Full Periodic Table

Full Periodic Table

Groups

Elements by Groups

Density

Elements by Density

A 4-foot interactive periodic table designed as both an art piece and a learning tool for high school classes, aimed at creating excitement around chemistry and visualizing elemental patterns.

Each of the 120 element boxes was individually 3D modelled with a unique symbol designed from scratch. Each box includes a diffusing layer halfway through to evenly spread light from the LEDs behind. The title and LED holes were CNC routed into the plywood backing.

Shown at several schools, the table allows students to visualize properties like melting point, electronegativity, and density through individually controllable, colour-coded LEDs which are controlled by a 3D-printed box housing an Arduino.

Winning Beam Optimization Design Competition

Designing the Highest Strength-to-Weight Ratio Beam · University Class Competition

SolidWorks CADFEAFDM PrintingWeldingEngineering Filaments
Beam Design Failures

Beam Designs & Failure Modes

Rig

Self-Made Testing Rig

Density

Final Beam Design

This was a competition in our Materials of Deformable Solids (MODs) class, where we designed, used FEA, and tested beams aimed at producing ones with the highest strength-to-weight ratio, with certain size constraints. We won this competition by achieving the highest ratio of 71,000 times the beam's own weight.

After printing and testing numerous beams with 9 different overarching designs, we landed on our final one. This final beam hit all the sizing constraints and took advantage of the fact that the testing rig had angled supports to hold the beam. This meant we could match the beam's lower geometry to match it, converting nearly all the force into compression.

After learning that the university's testing equipment was off limits, we decided to build our own testing rig. We designed and welded it out of metal tubing, then used force meters on wrenches for overall estimates before our final design was officially tested with the university's equipment. Our design also needed an incredibly rigid material, thus we used Bambu Lab's PPA-CF Engineering Filament.

Flashlight Signal Projector

Infinite Symbol Possibilities - Infinite Fun · Personal Project

Onshape CADFDM PrintingOptics
Signal Examples

Examples of Symbols

Version 1

Version 1

Version 2

Version 2

This project started as a cardboard cut-out of a Batman logo, taped to a stick in front of a small flashlight. Once the proof of concept was complete, I was hooked and started designing Version 1 of my bat signal. The flashlight outputted 3000 lumens, and the threaded attachment allowed me to crisply focus the image.

The flashlight I used in version 1, however, was a little flaky, so I switched to a Laser Excited Phosphor (LEP) flashlight. This flashlight technology is superb at shooting great distances, allowing me to shoot this signal for over a kilometre away.

I used this symbol frequently at the summer camp to trick kids into thinking that Batman will show up, or to simply draw their attention away. I decided to print the SOS as a potential emergency signal when camping; luckily, I have not needed to use it yet.

General 3D Printing Projects

Werkr Tractor Model

Werkr Tractor 3D Model

Mercedes Hood Ornament

Mercedes Hood Ornament

Local Church Model

Local Church 3D Model

Drill Boat Propeller

Cordless Drill Boat Propeller

Low Poly Bear Head

Low Poly Bear Head

V12 Engine Battery Holder

V12 Engine Battery Holder

Helical Aluminum Decoration

Helical Aluminum Decoration

Desk Organizer

Desk Organizer

Canoe Switch

Canoe Light Switch

Ravioli Mold

Ravioli Mold

PCB Design · Circuit Design · Arduino · Wiring · Soldering

Electrical Engineering

From PCB design and Arduino programming to wiring harness production and soldering, building reliable, testable electrical systems.

Electric Tractor Printed Circuit Board

First PCB design, success on first revision · Werkr Tractors Co-op · 2026

PCB DesignCircuit DesignWiring
PCB Board

Finished PCB — Werkr Tractor Computer Box V1

PCB EDA

PCB Layout in EDA

Installed

Installed in Control Box

As the autonomous tractor's control box grew more complex, debugging became harder and connections less reliable. I designed a custom PCB to reorganize the wiring, moving away from DIN rail connections and focusing on reliability and debuggability.

This was my first PCB design, mentored by professional electrical engineers. I am proud to say it was a success on the first revision, dramatically simplifying the wiring layout and improving system reliability.

Future-proofed with connections for future controls such as remote e-stops and emergency brakes, the PCB positions the tractor for expanded autonomy features.

Periodic Table, Arduino LED Control System

120 individually addressable LEDs · Interactive learning tool · Personal Project

Arduino IDELED ControlWiringCircuit Design
Groups

Elements by Groups

Density

Elements by Density

Animation

"Boil" Scrolling Animation

Full Table

Solid Colour Mode

The electrical backbone of the Periodic Table Wall Art, 120 individually addressable LEDs behind 3D printed element boxes with diffusing layers. All controlled by an Arduino.

Display modes: elements coloured by group, density, melting point, half-life, electronegativity, molecular composition, and various others. This allows students to discover patterns within the table. Scrolling text animations (e.g. "BOIL" for boiling point) add engagement.

Shown at several high schools to generate excitement about chemistry, making an abstract subject tangible and visually compelling.

Waterproof Motor Controllers & Golf Cart Conversion

Mechanical Engineering Co-op · Accelerated Systems Inc. · 2024

Circuit DesignWiringMotor Diagnostics
Motor Controller

Motor Controller Design

Golf Cart

Golf Cart Conversion

At Accelerated Systems Inc., I diagnosed and repaired broken electric motors, designed waterproof motor controllers, and converted gas-powered golf carts to electric drive systems.

Additional initiatives included managing all 3D printers in the shop and contributing to the restoration of a CNC machine.

Fine Woodworking · CNC Routing · Wood Turning · Epoxy Finishing

Woodworking

Fine woodworking and CNC routing across artistic and functional projects, often combined with 3D printing and electronics for multi-disciplinary builds.

Periodic Table Wall Art — Woodworking

4 ft structural frame combining woodworking, CNC routing, and finishing · Personal Project

WoodworkingCNC RoutingJoineryFinishing
Periodic Table

Finished Wall Art

CNC work

CNC Routed Board

The 4-foot frame and backing were built entirely from wood. Title lettering and LED holes were CNC routed into plywood with precise positioning to align with each of the 120 3D printed element boxes.

The frame required careful joinery to stay flat and square while supporting the weight of all the printed parts. Surface finishing and painting completed the professional presentation of the piece.

Woodworking acts as the structural and aesthetic foundation for multi-disciplinary builds, providing a stable, beautiful base for electronics and 3D printing layers above it.

Summer Camp Map — Woodworking & CNC Base

Structural base board, CNC terrain, and epoxied lakes · Personal Project for Silver Lake Mennonite Camp

WoodworkingCNC RoutingEpoxy FinishingPainting
CNC paths

CNC Routed Paths

Waterfront epoxy

Waterfront Epoxy Lake

The camp map base is a large wooden platform with terrain features CNC routed using a Scienci LongMill, paths carved into the surface, lake areas cut out and filled with coloured epoxy for a realistic water effect.

The board frame was hand-built to provide structural rigidity supporting nearly 500 printed parts. Finishing involved sanding, priming, and painting terrain before buildings were installed.

Helical Flame Sculpture

A flaming helical candle sculpture, fitting for any gathering · Personal Project for Waterloo North Mennonite Church

3D CADWoodworkingJoineryFire
CAD Model

CAD Model

Underside

Finished Product

On Tractor

Sculpture Alight

In Action

Nighttime Centrepiece

I was tasked with designing a sculpture that could bring in the essence of fire for a church. The helical structure, combined with 41 individual candles, gave this 3-foot sculpture an eye-catching effect.

Initially, it was lit in the daytime; however, I knew that at nighttime the candles would really shine, and they did not disappoint. 41 candles burning simultaneously give a lot of light, so one could easily use this for nighttime gatherings.

Finally, to really cap off the magnificence of the sculpture, I added a slowly rotating motor below to spin the entire thing. This allowed people to view all sides of it and see the cool illusion of the candles wandering up the helix.

Outdoors Folding Toolkit

A woodworking design project to make maintenance jobs easier · Personal Project

Woodworking3D PrintingJoineryFinishing
Expanded Box

Expanded Toolkit

Box in CAD

Toolkit in CAD

This handcrafted wooden toolbox was designed and built to provide a compact, organized solution for everyday maintenance and repair tasks around the house and at camp. The box features a folding layout with two stacked boxes per side, allowing easy access to tools while keeping the overall size compact.

The links for the folding-out boxes were 3D printed to ensure accuracy, which allowed the boxes to fold out evenly. The center compartments were designed to perfectly fit certain tools, ensuring they were snug with minimal chance of falling out.

General Woodworking Projects

Summer Camp Maintenance Sign
CNC

Summer Camp Maintenance Sign

A heavily edited version of Silver Lake Mennonite Camp's logo for their Maintenance Shed.

Dining Hall Model
Handmade

Dining Hall Model

A 3-foot wooden scale model of Silver Lake Mennonite Camp's Dining Hall.

Pen Set
Manual Lathe

Pen Set

Set of exotic pens for important occasions.

General Woodworking Skills

Hand Tools

  • All standard woodshop saws
  • Chisels & carving tools
  • Hand planes
  • Measuring & layout

Lathe Work

  • Manual wood turning
  • Spindle turning
  • Bowl turning
  • Fine detail work

CNC Routing

  • Scienci LongMill
  • Pocket & profile cuts
  • Text & lettering
  • Terrain carving

Finishing

  • Sanding & prep
  • Priming & painting
  • Epoxy pour finishing
  • Detail painting