Have you ever heard that ringing sound coming from an old TV? Well, that never happens anymore because TVs today use LEDs or other advanced technology. That old high-pitched whine came from the transformer that drove the cathode ray tube.

Even today when I hear that sound it sends a shiver down my spine, but I want to recreate that sound in this circuit.

Project Steps

Follow this schematic and put the components on the breadboard, or if you want you can solder it on some perfboard.

In the end it should look like this. There are not many parts so it’s easy to build.


This circuit is great for annoying someone, and because of the high frequency sound it bounces off walls making it hard to find.