In this step-by-step tutorial, learn how to make a powerful alarm at home using a DC motor. Perfect for DIY enthusiasts, this ...

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

Home security has been a major concern to families and individuals willing to keep their homes and loved ones safe.

Heart rate monitoring has been a mainstay of health and fitness, and while the stethoscope has given way to more precise electronic measuring devices, they've always involved wires and straps, or, in ...