Dodge temp sensor

[gadelhas]

Hi

Before integrated temperature sensors were introduced. Designers used forward biased
diodes and measured the voltage drop with temperature change. This was good enough for
HVAC system thermostats. The RC method would probably drive you crazy.

http://automationwiki.com/index.php/...rature_Sensors

Hi would do it with a 1N4148. Works good for this aproach!