I hope I have the right area of the forum.
I run a Windows 7 PC acting as a file/home web server which runs 24hrs a day. I have a home burgler alarm which can trigger a 12v feed when the alarm is activated. What I would like to do is have a system which will use the 12v trigger to activate an alert on the PC, which in turn would email me to alert me that the alarm (trigger) has been activated.
Could anyone advise me the best approach to take for this. I would like to do it as cheap as possible!