Sixteen EEG electrodes fit onto a 26 mm board
The open project puts sixteen EEG contacts, reference and ground on one small circular board, then streams measurements over Bluetooth. The most important part of the README may be the safety warning.
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Tech · page 14
IRZ Tech archive, page 14.
A reminder that returns until you finish the task
Marco Arment did not build another productivity system. He built an interface where dismissing, ignoring or postponing a reminder is not enough to make it disappear.
One webpage can tell humans and scrapers two different stories
ShieldFont uses OpenType substitution to show one text to humans and hand another to scrapers. It is not a lock. It is friction.
What's inside a five-dollar digital caliper
A teardown shows how a cheap caliper measures by capacitance, and why its battery drains itself in the drawer.
The IBM prototype nobody could identify, brought back piece by piece
A rare late-1980s IBM prototype, the 7496 Executive Workstation, comes back to life: floppy drive fixed, hard drive added, sound card grafted on.
Magnetic microrobots pull microplastics out of soil
MXene flakes made magnetic travel through soil to capture microplastics, then are recovered with a magnet. Shown in the lab, not yet in the field.
FreeCAD files finally get thumbnails in a self-hosted 3D library
The open-source Manyfold app can now render FreeCAD project thumbnails. Another small brick for makers who want to keep their 3D library under their own control.
One ESP32 can bring old Tasmota devices into Apple Home
TasmoShelf controls Tasmota devices directly over the local network. Recent ESP32 hardware can join Apple Home through Matter, while one ESP32 can bridge older ESP8266 devices.
Seventeen years of image experiments, inside one open-source toolbox
G’MIC 4.0 adds new filters, guided color transfer and creative-coding tools to an open-source framework that keeps exposing composable image-processing primitives.
Two RP2040s turn a laptop into a USB keyboard
Two tiny microcontrollers are enough to make a laptop’s keystrokes appear as a real USB keyboard on another machine. LapBoard targets a very ordinary headless-computer problem.