Hello
I have this circuit which give me "0" whenever it "see" movement
using a PIR sensor

now I want to reduce the output time
now the time is about 3.5 seconds
where I need to change to reduce it to ~1 seconds?
from some reason I can't upload the image
this is the circuit
http://www.kube.ch/downloads/pdf/kube_pir_demonstrator_tr256.pdf

 

Off hand it would appear that reducing the value of C1 in the schematic would reduce the response time accordingly. But capacitors C4 and C5 may also affect the response time.

 

To me a strange connection- OP Amp + input tied to Comp. - input with no V ref. other than a cap. to gnd.

 

PIR sensors are inherently slow, FYI.

 

I'm looking at C2, C6, and C7 for a time constant of more than a second, but that schematic is very hard to make sense of.

 

I have another schematic but I can't upload it
when I press "Upload a File" it do nothing