Use the PICs Watchdog Timer as a temperature sensor! Its frequency changes linearly over temperature, so it's possible to build a thermometer without external chip! See Microchip App Note AN720. They claim accuracy up to 1 degree Celsius.
file: /Techref/scenix/lib/io/osi1/sensor/temp.htm, 0KB, , updated: 1999/11/29 17:14, local time: 2024/11/20 02:23,
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