Electronics Projects Archive

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

Evaluating a Faulty DVD ROM 2

As I mentioned in the previous article about evaluating a faulty DVD ROM, I am discovering little-known components 🙂 There is an optical head drive motor in the mechanical section..

Evaluating a Faulty DVD ROM

For hobbyists and DIY users, computer parts have always been a great source of components, and DVD and CD ROM reader/writer devices are no exception. Their motors, mechanics, electronic parts,..

Long-Range Laser Light Barrier Circuit

The designed laser light barrier can provide reliable detection at a range of 100 meters and more. In this design, which uses a continuously operating wave (CW) laser diode in..

STM32 Battery-Powered Three-Phase Inverter

A difficult-to-implement 3-phase inverter project. It can provide inspiration for different projects, and its documentation is very good. Full project files prepared with Altium Designer, heatsink 3D drawings, STM32 source..

PPRC Welding Machine Repair – Thermostat Failure

The most common faults encountered in PPRC welding machines are heating element problems, cable breaks, and issues caused by the on-off switch. I encountered a thermostat failure in a small..

New Compact PCB Design TDA7377 2+1 Amplifier Circuit

The TDA7377 amplifier circuit is one of the projects I implemented years ago. The TDA7377 integrated circuit is used in many audio systems because it provides various output combinations, is..

Tweeter (Treble Speaker) Protection Circuit

The circuit effectively protects the sensitive tweeter within a speaker cabinet from overload. It was specifically designed to prevent damage to tweeters, particularly at high volume levels and under faulty..

Transformerless Staircase Lighter with Automatic Time Relay

Staircase light switch with 2 different trigger modes. The circuit functions as a classic staircase light switch. When the supply voltage (230V AC) is applied, the system enters standby mode,..

SMD Resistor Potentiometer PCB for Volume Control

This is a project to repair a faulty volume control potentiometer on an Odyssey-U-010 amplifier. In the original setup, large resistors were soldered to the top. Instead of using a..

New Battery Capacity Meter Mini ESP8266

The Battery Capacity Meter allows you to measure the capacity of any battery or accumulator; it can also be used as a precise voltmeter, milliammeter, and power meter. It discharges..