A single diode can replace thermistors for temp. sensing:

A project log for The Cave Pearl Project

Creating a generic underwater data logging platform that is easy to build & modify for many different environmental monitoring projects.

Edward MallonEdward Mallon 11/04/2019 at 14:540 Comments

A while back HD posted about using diodes as cheap temperature sensors:

But chasing mV sized forward voltage deltas is hard to do with the limited ADC on most mcu's. Our LED light-sensing experiments demonstrated that timing reverse-bias decay with the Input Capture Unit on an Arduino is easy to do, and provides high resolution temperature readings from a single diode without any amplification: