Timothy Hadfield TimothyHadfield

Hi, I'm Timothy 👋

Electrical Engineering student at Utah Valley University. I build hardware projects in the lab, and web apps, games and tools for things I actually use, mostly on my phone. Click a picture to open it.

Hardware

Polar CNC Plotter
A pen plotter that spins the paper under the pen: Arduino + GRBL, 3 stepper axes, a salvaged DVD-drive stepper and custom 3D prints.

4-Bit Adder / Subtractor
Binary adder and two's-complement subtractor: designed in Multisim, built on a breadboard with 74LS83 and 74LS04 chips.

Software

Fitness Tracker · code A lifting tracker built to beat a spreadsheet: build workouts, log one-handed mid-set, and watch your strength move.	Fantasy Football · code Companion site for an ESPN league: draft assistant, trade finder, season simulations and stats.
No-Risk Betting · code A betting app with no real money: live Kalshi odds, a virtual $1,000, parlays and a forecasting score.	Secret Hitler Companion · code Table companion for the board game: live claim probabilities, lie modeling, stats and game replays.
Cribbage · code Two-player cribbage to 121 against a strong computer, with discard hints and every count explained.	Mind Lab · code Nine browser games where an AI learns your habits and predicts what you'll do next.
Venture Lab · code Strategy lab for the card game Venture (Lost Cities): hidden cards revealed, AI duels and tournaments.	Catan Statistics · code Dice tracker with an actual-vs-expected roll chart, plus a board builder that scores every settlement spot.
Wavelength · code The party game Wavelength for two teams on one shared screen.	BANK AI Trainer · code Reinforcement-learning AI for the dice game BANK: train it in your browser, then play against it.
BANK Evolution · code Evolves BANK strategies by natural selection, then lets the winners compete or play against you.	Gravity Orb Simulator · code Drop orbs and watch them orbit, spiral and merge in a browser physics sandbox.
Quote Generator · code An inspirational quote from my favorites, one tap at a time, with no repeats.	Estimator Quiz · code Guess numbers you can't know exactly and score up to 1,000 points for how close you get, across 2,500 questions.

More projects

Dungeon Crawler · code Roguelike dungeon crawler: 4 classes, 10 random floors, loot, level-ups and a dragon boss.	Predictions vs Reality · code An interactive essay on why forecasts fail: 24 famous predictions, a Hall of Fame and a calibration game.	Space Travel · code Fly a rocket near light speed on a star map, watch the clocks disagree, and see how much fuel it takes.
Relativity Graphs · code Four interactive graphs of slowing clocks, shrinking rulers, rocket fuel and the energy wall near light speed.	Room Planner · code To-scale bedroom planner: draw the room, drag furniture, and it flags anything that won't fit.	Who Should I Cheer For? · code Pick your World Cup teams; a Monte-Carlo sim tells you who to root for in every match.
March Madness · code 40 years of NCAA seed history, past brackets, and a tunable bracket simulator.	Geoguesser · code Learn the world map by region: name every country or find each one on the map.	BANK Pro AI PyTorch AI that teaches itself the dice game BANK, with a dashboard to train it and play against it.
World Cup Bracket · code Play the 2026 World Cup out on FIFA with friends: scores, standings, bracket and head-to-head stats.	Craft Horse · code Minecraft horse calculator that scores your horses and picks the best pair to breed.	Bouncy Ball · code Physics puzzle: slingshot the ball past fans and spikes into the cup, then build your own levels.
Rankings · code Rank anything by choosing between two at a time; the app works out your true order.	Word Speed Trainer · code Typing drill for country names that times every word and graphs where you're slow.	Timeline · code Zoomable timeline where big events stand out and small ones appear as you zoom in.