juul pods are more sophisticated than you might think. the circuitry monitors the resistance change of the heating coil to estimate its temperature and adjusts

juul pods are more sophisticated than you might think. the circuitry monitors the resistance change of the heating coil to estimate its temperature and adjusts the power to hit a target. this stops the wick from burning if it's dry (very unpleasant for the user) and delivers a consistent experience mostly independent of airflow over the coil. it takes a lot of engineering effort to make that work in such a small form factor and cheap enough to be disposable.