Adding a serial port to a QNAP TS-473A NAS for local shell access

Fixing the auto empty dustbin voltage error on a Roborock S7 Ultra dock by replacing the power supply unit.

The physical and secutity failure of a Xiaomi YeeLight light bulb

Fun with an oscilloscope, ESP32 DACs and the DVD logo

Looking inside a digital pregnancy test from the pharmacy

Reversing a CANbus odometer filter/manipulator featured in Big Clive’s video

A teardown of a simple commercial pulse oximeter.