I am working to test the PIR Sensor Schematic on breadboard. I'm using PIR203S sensor. The Schematic working good up to 1feet of distance at full range of potentiometer, whenever I do some motion near the sensor they detect the motion but when I increase the distance from 1 feet they not detect the motion. The potentiometer also work. similarly when I use Fresnel lens then the sensor completely stop the detection.
can anyone help what will be the problem?
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