Well, I don't have 30 years experience at anything, except "Beer Processor".   I just pour it in one end, and it comes out the other in about a half an hour.   So, maybe I'm not the guy to listen too....but...


It seems to me that most alarm systems are contained within the same perimeter that it is protecting. While the movies always seem to have a key element of the system located in an unsecured area where it can easily be defeated by cutting a couple wires and using some alligator clips.   That's not very realistic.

If any tampering is going to be done to the system, you would first have to breach the perimeter to get to the wiring in the first place. Which of course would set off the alarm.

So, the time when the tampering occurs, is when then system is dis-armed, and people are walking around everywhere unchecked. If you can by-pass sensors during the day, you can come back at night and clean the place out.

In the case of alarmbox.BMP in post #9, all you need to do is twist the two pairs of wires together, and your done.

And, in Luciano's example, you can just bypass any switch with a short, and you're in.
Code:
Not secure system

+5 --R2--+
         |
AN0 -----------------S1--------S2-------S3---------S4R1--+ 
                    |__|      |__|     |__|              |                                                 
GND -----------------------------------------------------+
Personaly, I think you are better off using the original plan.

And, you would use the ADCIN statement to read the input. I think that's what you're prior question was??