The TPMS warning is the least-understood light on your dashboard, and behind it sits a genuinely hard embedded-systems problem: a sealed sensor that must survive a decade inside a spinning tire at highway g-forces on a battery it can never recharge. Direct versus indirect, the RF mess, the relearn headache, and the deadly recall that made it the law.
Sensors
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Modern Tire Pressure Monitoring Systems: The Engineering Behind the Most-Ignored Light -
How a Camera Sensor Works Every photograph starts at a piece of silicon counting photons, and almost every interesting difference between a phone and a full-frame camera traces back to sensor engineering. We walk the photon-to- electron conversion, the Bayer color filter array, back-side illumination, stacked sensors, the ADC and read-noise budget, and why the same scene produces very different files on different chips.
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Wearable Sensor Accuracy: What Your Watch Can and Cannot Measure A measurement-engineer's reading of consumer wearables: which numbers on your watch are real signal, which are model-driven fiction, and how the underlying sensors (PPG, accelerometer, SpO2, ECG, skin temperature) actually behave under load, low perfusion, dark skin tones, and free-living conditions.
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ESP32 and MicroPython for the Homelab: Custom Sensors and Home Assistant Integrations from Scratch The software engineer's entry point into microcontrollers: choosing the right ESP32 variant, flashing MicroPython, wiring up real sensors, publishing to MQTT, and integrating with Home Assistant — plus when to use ESPHome instead.