Smart security systems are not just about catching a neighborhood cat in the act. They help keep a watchful eye when you can't, and they can be automated to trigger other devices as needed—such as a ...

In this step-by-step tutorial, you'll learn how to make a very loud, simple, and powerful alarm using everyday materials.

The best DIY home security systems are affordable and easy to set up without a professional. Some or all of the mortgage lenders featured on our site are advertising partners of NerdWallet, but this ...