// Engineering
A Biohacking Workstation in Your Pocket: Cardputer + BitPirate Against Embedded Medical Devices
A single ESP32-S3 board the size of a business card, running open-source firmware, will speak nearly every wired bus and radio protocol an embedded medical device uses. This is how I use an M5Stack Cardputer ADV with BitPirate as a portable protocol workbench — to map hardware, watch a device boot, sniff its buses and radios, and pull its firmware — worked all the way through with an infusion pump, plus a targeted probing plan. Authorised, isolated, off the patient. The legal and safety constraints are not an appendix here; they are the first tool you pick up.
Read article →When the Spare Part No Longer Exists: Reverse-Engineering a Medical Machine Back to Life
A working medical machine can be retired by the failure of a single small plastic part the manufacturer no longer sells. This is a service I offer to medical institutions: take a worn or broken component, reverse-engineer it into parametric CAD, and 3D-print a faithful replacement. Here is the full workflow, told through one real part — a filter cap — from caliper to finished print.
Read article →Binaural Beat Generator: Web Audio API, Psychoacoustics, and Client-Side WAV Export
How the Binaural Beat Generator works — Web Audio API graph construction, real-time oscilloscope rendering, brainwave frequency bands, and exporting a 60-second stereo WAV entirely client-side using OfflineAudioContext.
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