Dallas Temperature Control Library - MilesBurton.com
The DS18B20 is a very small thermometer which can be easily hooked into the Arduino MCU through any digital input! It requires very little in the way of additional support, a couple of resistors and some hookup cables and you're set to go.
Tue Nov 2 22:55:59 2010 - permalink -
For more information on the DS18B20 check out [Maxim-IC].