Hi (new user), I am completely new to the world of electronics and have hit a brick wall so far on a project which introduces the temperature sensor - namely that I believe (from what I could find online), in spite of following the instructions, I am managing to short-circuit somewhere.
At any rate, the temperature sensor is piping hot moments after attaching the USB (so it not being able to detect any changes in the ambient temperature is both obvious, and most likely the least of my worries)
From the attachment provided can anyone see anything obvious that is wrong (I've checked everything is firmly connected) ?
EDIT For some reason I'm not able to upload an attachment (jpg size = 904.4kb), trying to get this sorted ...
link to image
your attachment seems to missing
Just making a guess. If your sensor has gotten very hot, you might have hooked the power leads up backward. Usually once this has occurred, don't count on the sensor working right. I've had occasions where I accidentally applied about 8 v. to an analog pin on an Arduino, and had the chip mostly, but not entirely, continue to function.
Hi,
I suggest if you haven't already, obtain a Digital Multimeter, nothing flash or high priced.
$20.00 should get you a decent DMM with the necessary ranges.
Tom.... 
Thanks for the replies folks, inspired by jrdoner I wondered what would happen if I rotated my temperature sensor by 180 degrees on the board (effectively reversing the direction of flow through the sensor), and now it seems to be working correctly.
I will definitely be looking into getting myself a multimeter!