Analogic voltmeter, with LEDs

Check out this relay timer circuit

Simple to make, but extremely useful instrument, especially when designing solar systems.

This 4 digits 7 segments display module is controlled using 74HC595 Shift Register. The module uses a single standard common anode display

The Pinecil LED Ring adds three LED lights to the Pinecil soldering iron to improve soldering in dark environments. This addition to the Pinecil soldering iron fits just above the soldering tip on the plastic area by friction so no glueing is required. It is easy to assemble and add to the iron using another soldering iron to connect the internals.

Applications: air conditioning, central heating, coolers, laboratory, greenhouses, aquariums, ventilation.

This programmer is intended for the family of PIC 8-40 pin microcontrollers, using an universal socket.

Electronic load on Atmega8 microcontroller and field-effect transistors (MOSFET). The board size is 60x100mm. The quality of the boards is very good. Thanks Elecrow!!!

I am going to use this screen to create a touch panel for my home automation system.

A wrist watch on rare vintage LED dot-matrix HDSP-2000 indicators

Metal detector handmade DIY

Most people are unaware of Cosmic Rays, yet they exist everywhere, unseen or felt. They were created long ago when primary particles get accelerated to near the speed of light by the tremendous magnetic shockwaves when stars supernova, black holes eat, and binary stars merge. The very same processes that thrust heavy elements made inside stars and other extreme events to form interstellar dust, asteroids, planets, and the building blocks for life. Cosmic Rays are an ongoing and continuous reminder of the immense scale, age, and complexity of the universe and the importance of science to our understanding. Building a Cosmic Ray Muon Detector allows anyone to collect data and visualise or make music from Cosmic Ray showers here on Earth. It is an opportunity to share an appreciation of Cosmic Rays: how tiny our little blue planet is, where it exists within the vastness of the universe, a precious, rare and fragile place, something worth protecting.

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.

Build a miniature DIY FPV drone that operates fully on Arduino hardware for a fun learning experience and thrilling living room racing.

In this project, we will build a tiny internet clock connected to your wifi to get time from NTP servers.