This is an incredibly cheap and visually fascinating toy through which we can learn a lot about the behavior and physics of standing waves.

A sensitive metal detector which is a great example of cooperation between a microcontroller and an Android smartphone.

Simple to build ESP32 VU meter on Round Dispalys with Peak Meters.

This is a relatively simple, visually effective balancing robot project that only requires four components to make.

The device presented in this project uses an Elecrow E-Paper display module with a built-in ESP32S microcontroller and additional components enclosed into a suitable housing, and requires almost no hardware intervention, so we only need to install the sketch and get a fully functional final product.

This is a simple visually interesting toy for describing fluid dynamics.

Tesla Coil design made with only one Vacuum Tube and a few passive elements powered by MOT Transformer.

A visually and functionally effective beginner project that only required three components to build.

This is an interesting and simple to make two player Arduino game that can be made in less than a day.

Simple and inexpensive way to make such a device, if you have basic knowledge of electronics and microcontrollers.

Cheap and easy-to-build VFO device that is almost indispensable in radio engineering, especially in DIY radio receivers.

This is a relatively cheap complete Tesla coil driver, so we only need a primary and secondary coil to build functional Tesla coil.