An engineer's tour of the automatic transmission: planetary gearsets as mechanical computers, the torque converter as a fluid coupling with a lockup cheat, valve bodies as hydraulic logic predating microcontrollers, modern mechatronic shift control, and an honest look at CVT belts, dual-clutch trade-offs, and why "lifetime fill" is marketing.
Process-Engineering
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How Automatic Transmissions Work -
The Espresso Machine Is a Control System An engineer's tour of the espresso machine as a thermal-hydraulic control problem: PID loops fighting boiler thermal mass, the puck as a time-varying resistance, the architectures (thermoblock, thermosyphon, dual boiler) framed honestly, and the open-source firmware scene rebuilding the inside of a $5,000 machine from a Gaggia and an STM32.