PIR sensor and their design

I want to know all about pir sensor and their circuits in detail.
circuit can be analog or it can digital using DSP.

I am using few PIR sensor and using kc778b chip for their interfacing.
I am planing to use other sensor which is not compatible with kc778b i.e RE05
I am presently using RE200, SDA05,RE46 etc.




can u provide me cool links for this :idea:

Most ready PIR sensors use analog circuitry. Atleast I havent seen any PIR using DSP. Why do you want to build one when ready PIR sensors are easily available?

i think this guy wants to find a way of disengaging them while not setting off the alarm.javascript:emoticon(':lol:')
Laughing