how to write a program for a burglar alarm using sensor to an ic ?

I would recomend an arduino
google it
I found some instructions on how to use a PIR sensor
rickharris4 years ago
Much, in fact everything, depends on what controller ic your going to use.

In principle:

Check input 1 if input on jump to Alarm
Check input 2 if input on jump to Alarm
... repeat for all inputs

repeat loop


Sound alarm
wait 180 seconds (to allow enough time for alarm to register)
reset alarm (this avoids driving the neighbours nuts)

repeat loop