Electronics Projects Archive

Electronic plans news for electronic hobbyist or engineers. Free electronic schematics (circuits) electronic blog site. Electronic content post and more..

Standby Mode Power Consumption Save Electricity and Protect Electrical Devices

I recently replaced the shock absorber felts on my washing machine. When I saw the wiring I made years ago for Electricity Savings, I decided to write this article. We’ve..

LM3914 NTC-FAN Cooler Temperature Control with LED Display + Protection Relay

The circuit is primarily designed to monitor, control, and protect the temperature of a power supply’s cooler. It can also be used in amplifiers and other cooler-equipped circuits. It can..

Classic Transistor Power Supply 0-40V 0-5A

The Transistor Professional Power Supply is simple and uncomplicated, offering voltage adjustments of 0.40V and current adjustments of 0.5A. The transformer used is 36VAC, 200W, and TIP142 output transistors. For..

Professional Subwoofer Subsonic Filter 100W Amplifier Complete Project

The 100W bass amplifier is designed for installation in a speaker cabinet. It consists of three sections located on separate printed circuit boards: a subwoofer filter section and a power..

Mosquito Repellent Repair Review Raid Liquid Tablet

I’ve always wondered what the heating system in these tablet and liquid mosquito repellents is like. When the faulty devices arrived, I had the opportunity to examine the liquid system…

Electronic Pigeon Repeller

The Pigeon Repellent device reproduces the sound of the hawk, a natural enemy of pigeons. Pressing the button activates the hawk’s call. When this button is held open, the hawk’s..

Rodent and Bird Repellent Device

The Electronic Bird, Rodent Repeller is a highly effective and environmentally friendly device for repelling birds. With a sound level exceeding 100dB, it can repel not only birds but also..

Two-in-One 0-50V 0-5A Power Supply + Electronic Load Circuit

I don’t usually share power supplies that aren’t used in practice, but this project design is interesting, with a good power and voltage range. It’s a regulated power supply that..

TL494 PWM Excavator Hydraulic Valve Control

The device is designed to control the solenoids of the loader bucket’s hydraulic system valves. The bucket control is hydraulic and consists of a valve system controlled by solenoids A-B-C-D…

NE555 LM317 LM358 4-20mA 0-10V Converter (+0-5V) for PLC

Analog industrial transmission standards are still in use, as evidenced by the wide range of sensors available on the market. Existing systems sometimes require maintenance or expansion with new sensors…