The on voltage of a typical diode has an inverse temperature coefficient, as shown in the first video of the series. The mirrored constant current sources from the previous videos are used to push a constant current through a diode. The voltage across the diode is offset and amplified by an Op Amp, and the temperature dependent signal can be mapped to the ADC range of a microcontroller.
documentation:
https://drive.google.com/file/d/1Lac4X7ZWTUsQ8HUhUPuGmi-bPeehvOAg/view?usp=sharing
