Hello! I'm Jeff, the Fubsy Polymath.

You might know me as tjscientist. I make things edible, audible & hackable.

Engineer since birth — soldering at five, still building robots, synths, clocks & hacking tools. More about me →

Alcohol

Alcohol Brewing, Distillation, and Fermentation. Live

Analog Computers

Analog Computers Op-amps that solve equations — computing in continuous voltage. Live

Antennas

Antennas The hardware between the radio and free space — dipoles to dishes, BALUNs, matching networks, measurement gear, and satellite tracking. DIY build + commercial buy throughout. Live

Antique Medical Equipment

Coming soon

Antique Medical Equipment …and quack devices. A museum-style collection of antique medical, surgical & pseudo-medical apparatus — violet-ray wands, electropathic belts, radionics boxes, embalming machines, and early electrotherapy — studied device by device. Coming soon

Calculators

Calculators Mechanical & electronic calculators — Curta, the Adam Savage giant Curta, the Arithmos build, and more to come. Live

Clocks

Clocks Nixie, LED & mechanical — telling time with style. Live

Cyberdecks

Cyberdecks DIY and commercial cyberdecks — portable field computers with an integrated keyboard and screen. Clockwork uConsole & PicoCalc, the DFCD FreeCAD deck, and a full Raspberry Pi 5 PiFlux build with all add-ons. Live

Electronics

Electronics Designs for amps, synthesizers, effects, and so much more. Live

Firearms

Firearms Standard, historical & accurate movie replicas. Live

Firmware

Firmware Deep dives on hacking firmware — Evil-M5Project, Mayhem, ESP32 Marauder, Ducky Script — and the devices each runs on. Live

Food

Food Food & recipes — what's coming out of my kitchen. Live

Hacking

Hacking Hardware, RF & security tinkering. Live

Iconic Machines

Iconic Machines A museum-style collection of famous reproduced and collected machines (digital and electromechanical), each a multi-volume deep dive ending on the open-source build or artifact. Launch units: Enigma (Open Enigma) and the Apollo DSKY (Open DSKY). Live

JoJo Bee's Sweets

JoJo Bee's Sweets Honey, beeswax, maple syrup & small-batch baking from our family hives. Live

Music Studio

Music Studio Synths, effects & the home studio — building the sound. Live

Other Stuff

Other Stuff A place for things that have no place. Live

Radios

Radios Ham handhelds, HF rigs, DMR hotspots, shortwave & weather RX, CW gear, and a CubeSat simulator. Live

Research

Research Tech essays and investigations — Bad Apple, why hackers prefer Linux, CMATRIX, hacker tradecraft, and more. Live

Robots

Robots Robot Builds, Restorations, and Concepts. Live

Scanners

Scanners Scanners old & new, ham radios, mesh networks, and so much more. Live

Slide Rules

Slide Rules Computing before silicon — logarithms you can hold. Live

Television

Television The history, theory, and hands-on restoration and building of television — starting before the CRT with the Televisor, Baird's 1920s mechanical TV (Nipkow-disc scanning). Mechanical-TV deep dive + a build log for the MindSets NBTV Televisor kit (NBTV signal, live streaming, steampunk cabinet). Live

Test Equipment

Test Equipment From vacuum-tube testers to spectrum analyzers and everything in between. Live

Vintage Digital Computers

Vintage Digital Computers The machines that went discrete — minicomputers and microcomputers, studied to the gate and rebuilt on the bench. Live