PIR Motion sensor module

This sensor gives a digital signal or analog in output?? It gives HIGH and LOW or another type of signal??
Thanks

I used a simple 555 timer circuit and an LM7805 along with a relay and a 12VDC wallwart to build a automatic closet light...super simple to use.

Garrett's right, the sensors are very quick to setup and easy use. They can detect large movements at around 20 feet. And I haven't found PIR modules for cheaper.

Very easy to hook up, and extremely sensitive from all directions. I would say almost 130 degree detection. These also drain very little current, you could run one for a couple years on some AA batteries.