Simple pinpoint metal detector that, although made only with standard electronic components, has quite satisfactory sensitivity, detecting a small coin at a distance of 4-5 cm, and a larger object at 7-8 cm and more.

This is a visually impressive hourglass simulation project, and despite its simplicity, there are many possibilities for modifying most parameters.

This Arduino project is very simple to make and has a huge practical application.

Raspberry Pi development board with SDR hardware, which functions as a web server, and the radio is accessed via a web browser.

Minimal version of Tetris with probably the lowest possible display resolution of only 64 pixels.

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.