Things I’ve built that you can use right now, free, in your browser.
Tools
Kerf: code CAD for laser cutting. Write a few lines, get finger-jointed boxes, hinges, gears and living-hinge curves, check the fit in 3D, and export SVG sheets. More about Kerf
Stereogram Studio: make your own Magic Eye pictures and red/cyan random-dot images from text, a drawing or a photo. More about Stereogram Studio
Colour Plate Studio: make colour-vision test plates with your own hidden number or text, tuned for red-green or blue-yellow colour blindness.
TeX Calc: a calculator you type math into the way you’d write it. Solves equations, integrals, differential equations and matrices, and plots in 2D and 3D.
Games
VR Arcade: small games for the Meta Quest, played straight from the browser with no install. Load a cannon by hand, build a Rube Goldberg machine on your desk, shoot inside a spinning space station, and more. How the arcade works · Artillery · Coriolis
Channel Thirteen: a short, free browser game played with red/cyan 3D glasses. Something is hiding in the static. More about Channel Thirteen
Hardware and FPGA write-ups
Reverse-engineering a ceiling fan remote, and a series on PetaLinux, UIO drivers and Vitis HLS on the Zybo Z7.