This project is build around mbed platform which features LPC1768 ARM Cortex M3 microcontroller. IT reads temperature from DS1620 IC. mbed reads correct time values via Network Time Protocol (NTP) and then logs temperature values to ThingSpeak.
ThingSpeak is a great and open application platform that allows users to upload various data by using a web service. It already provides a nice chart API that can be embedded in to your web page for real time data visualization. Check out for more ways to send data to ThingSpeak.