Electronics Projects Circuits

Arduino Nano Battery and Accumulator Capacity and Internal Resistance Tester. This is a project I started at the request of one of our readers. I also work with Li-ion cells..

The 40-meter AM transmitter circuit with IRFP150 MOSFET is a project with approximately 5W carrier output, consisting of a 7MHz crystal oscillator, discrete-transistor RF driver, drain-modulated power stage, and electret..

Battery holders printed with a 3D printer are very useful parts in hobby electronics projects. Ready-made battery holders may not always be available in the desired size, cell count, or..

100W, 300W, and 500W transistor power amplifiers have been prepared with a similar logic. There are some differences in the circuit schematics, but they are designs that address different levels..

This stereo amplifier circuit built with STK4131-II is a practical audio amplifier solution that can be used at home, in a workshop, or in small workplaces. The circuit has an..

The automatic battery charger circuit with IRF9540 MOSFET charges 12 V lead-acid vehicle batteries with a transformer rectifier and cuts off the main current at approximately 16 V. Since it..

The fan speed control circuit is a simple MOSFET regulator that automatically adjusts the rotational speed of a 12V DC fan using an NTC temperature sensor. It is suitable for..

The 0-1200 V adjustable flyback SMPS circuit is a 120 W class power supply designed to obtain isolated high voltage from the mains. Its output can be controlled with a..

When audio amplifier ICs that operate with high supply voltage, such as TDA7294 and TDA7293, are intended to be used with a car battery or 12V source, the most important..

PLL FM 8W transmitter circuit is an RF project board with digitally adjustable frequency in the 88-108 MHz band, controlled by a TSA5511 PLL synthesizer and PIC16F84. The circuit uses..