Designing the right home security system requires some planning, so don’t rush out and buy a kit as your first step. You’ll ...

have it toggle a relay hooked up to a loud siren. Even if you aren’t looking to make your own makeshift alarm system, the code and video after the break are a great example to follow if you want ...

12 V DC external power supply can be connected, if necessary. The built-in accelerometer will raise the alarm if an attempt is made to remove the siren. Installation and set up Ready to operate ...