Jeff

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 →

✦ Newest deep dives

Test Equipment NEW
Test Equipment Test Equipment
CubeSat Simulator
CubeSat Simulator Electronics
Altair 8800
Altair 8800 Digital Computers
PDP-8/I
PDP-8/I Digital Computers
Categories ▾
Radio & RF
Security
Computing
Build & technique
Machines & objects
Food & home
History & science
Food Live
Food Food & recipes — what's coming out of my kitchen. Live
Alcohol Live
Alcohol Brewing, Distillation, and Fermentation. Live
JoJo Bee's Sweets Live
JoJo Bee's Sweets Honey, beeswax, maple syrup & small-batch baking from our family hives. Live
Electronics Live
Electronics Designs for amps, synthesizers, effects, and so much more. Live
Music Studio Live
Music Studio Synths, effects & the home studio — building the sound. Live
Hacking Live
Hacking Hardware, RF & security tinkering. Live
Scanners & Radios Live
Scanners & Radios Scanners old & new, ham radios, mesh networks, and so much more. Live
Test Equipment Live
Test Equipment From vacuum-tube testers to spectrum analyzers and everything in between. Live
Analog Computers Live
Analog Computers Op-amps that solve equations — computing in continuous voltage. Live
Slide Rules Live
Slide Rules Computing before silicon — logarithms you can hold. Live
Clocks Live
Clocks Nixie, LED & mechanical — telling time with style. Live
Robots Live
Robots Vintage personal robots — HEROs and Omnibots restored. Live
Firearms Live
Firearms Standard, historical & accurate movie replicas. Live
Other Stuff Live
Other Stuff A place for things that have no place. Live
Iconic Machines Live
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
Digital Computers Live
Digital Computers The machines that went discrete — minicomputers and microcomputers, studied to the gate and rebuilt on the bench. Live