I connect LDR and PIR sensor to input of Transistor And gate circuit and connect 4 LED 12V 1W to output . But LED is bright all time. when have no input from both sensor LED is little bright. So, I pull out input from LDR. when somebody pass PIR sensor it's more bright . And If have input from both sensor it's most bright. I want only ON/OFF LED not want little bright. I want to set LED output hight (12V) when input from LDR and PIR sensor is hight only. I'm not sure can it use with opamp comparator. how to fix it.

 

hi mm,

Is your circuit complete.?? R9 looks incorrectly connected?

Also the value of R1.?
E

 

Your LDR circuit has no positive voltage supply.

 

There are clearly multiple mistakes with this schematic, and purely accidental if this circuit is doing anything close to what you are aiming for... you need to relook the schematic.

 

There is no power to the PIR sensor as drawn.

Bob