Metal detector handmade DIY

A programmer circuit for AVR uC.

The Open Source Fusion USB 3.0 Charge Pro is an all-in-one keychain tool for secure and efficient USB charging. It features a USB Power Meter to monitor charging, a Cable Tester to check cable integrity, a USB Condom for data protection when charging in public, and a Power Splitter to charge multiple devices from one port—all in a compact design.

Project #15: Environment – RTC – Mk26

Effortlessly monitor your home's energy consumption with the DIY Smart Powermeter, seamlessly integrated with the user-friendly Home Assistant platform. This powerful project provides real-time data on your household's energy usage and offers the added convenience of a snapshot of your grid's status whenever you open the electric closet, thanks to the 2.9' e-paper display. Featuring an integrated 230VAC to 5VDC regulator, the ESP32-S2 efficiently harnesses power from surrounding wires for optimal performance. The Smart Powermeter supports up to six different CT clamps, with or without a burden resistor, allowing for versatile monitoring options. Additionally, it can measure ambient temperature, giving you comprehensive insights into your energy consumption and surroundings.

Headphone amplifier published in “Transistor Gijutsu” magazine

The project represents an electronic switch actuated by the value of the light intensity that excites a photoresistor.

This guide demonstrates how to craft a Star Wars game with the ESP8266, OLED Display, and Joystick Module

In this tutorial I'll show you guys how to make this super simple 4x4x4 PCB LED cube "without over complicating anything".

Project #15: Environment – Crowtail Moisture Sensor – Mk22

Project #15: Environment – Soil Moisture Sensor – Mk20

Project #15: Environment – SD – Mk28

Every year, there is a huge number of children that get hurt by playing with the firecracker. A device that allows he to ignite the firecrackers in a safe distance would be useful, I began to plan and implement such a device by myself.

This is certainly the cheapest and simplest Internet radio that you can make yourself if you have minimal knowledge in the field of electronics, and all thanks to this universal and practical display module.