Learn how to make a simple door alarm to enhance your home security with our step-by-step guide. This DIY theft alert alarm is perfect for keeping unwanted guests away and protecting your belongings.

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

We independently review everything we recommend. When you buy through our links, we may earn a commission. Learn more› By Annie Chou Annie Chou is a writer covering home office, cameras, and games.

Ctrl + Space (or Cmd + Space on Mac) is your go-to for basic code completion. Start typing a variable or function name, hit ...