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

Learning Morse Code is no longer a requirement for HAMs in many jurisdictions, but it’s still a nice skill to have. [I_void(warranties)] wanted to learn, but couldn’t find a trainer ...

With smart home gadgets and budget-friendly tech, it’s never been easier to build your own DIY home security system. But easy ...

In this informative video, you'll learn how to make a door alarm using simple materials and easy steps. Perfect for enhancing ...

The audio component centers around the SS8550 PNP transistor (Q1) which serves as a driver for the passive buzzer (BZ1). This ...