This setup will provide a frequency of (45000000/255*692) = 255 Hz and we can vary the duty cycle to observe the changes in the sound of the buzzer.
We can adjust delay time to Set how long the output remains high after detecting motion…. Anywhere from 5 seconds to 5 minutes. Similarly sensitivity adjusts the range from 3 to 7 meters.
Retrigger setting jumper is to set for single or repeatable jumpers.
In the ADC configuration, Enable SCAN CONVERSION and Continuous Conversion, If you don’t know what they are, please go to the links in the first paragraph.
LM35 is an integrated-circuit temperature device with an output voltage linearly proportional to the centigrade temperature. As LM35 is not calibrated in Kelvin, user does not require to subtract large constant voltage from the output to obtain convenient centigrade scaling.