he found an old alarm panel set up — but it had no monitoring service any more. Not wanting to pay a monthly fee to have it setup, he decided to try interfacing an Arduino with the system in ...

[Jeff Sandberg] demonstrates that ably with his project to use ancient 1990s burglar alarm sensors in ... in question are from an old GM Interlogix security system. The sensors themselves sit ...

Many people use their phone for a morning alarm. But you might sleep better and wake up easier with a dedicated clock.