It's entirely possible that there simply are no cards to display.  If you don't have a wireless connection on, for instance, it can't fetch data to populate cards for viewing.

Available cards also depend on several other factors such as whether the GPS is on, whether you allow Google to track you/your data, and what country you live in (most Now cards are US-centric; living in Canada, the only ones that ever come up for me are weather and "time to travel" Navigation cards)

Problem with Google Now in Tab 2
I know this is a very stupid question.

Lm35 has 3 pins: Vcc, Analog output voltage, Gnd.

Is it ok to measure between analog output voltage and gnd? Im asking because Vcc and Gnd is a dc.
