Electronics Projects Archive

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

Li-Po Lifepo4 Li-Ion Battery Protection Circuit Discharge Short Circuit

The advantages of lithium batteries are many, first of all, high power, low weight and no “memory effect”. Also, a lithium battery has three times the voltage of a nickel-cadmium..

PIC18F4620 Combination Lock for Apartment 100 Users

The combination lock circuit displays the information and settings entered from the keypad built on the PIC18F4620 microcontroller on the LCD screen. All user password information settings are kept in..

Transformer Winding Machine Control Board

The control card made for the transformer winding machine can control the winding from 0 to 99.999 turns with 5 steps. You can use common cathode or common anode Led..

Stereo Tone Control Circuit with Opamp

Built on stereo tone control circuit TL072, LM358 Opams PCB dimensions are small 56x68mm. The supply voltage of the tone control circuit is unipolar. A virtual ground is created with..

Subwoofer Filter Circuit 50..200Hz

The subwoofer filter, or low-pass filter, is designed to suppress high frequencies that shouldn’t be fed into the audio amplifier’s input and then into the low-frequency head (woofer, subwoofer). The..

1-7 Channel Weekly Timer

A 2X16 LCD screen is used to display the data based on the weekly timer circuit PIC16F628A microcontroller and the DS1302 real time clock IC. There are different software for..

HT6P20B PT2240 PT2262 Clones

PT2240, PT2262, HT6P20B RF Transceiver ICs were cloned as software and application circuits were made with microcontroller. Clone circuits may be higher in cost, but it is a very good..

12V 24V 32V Motor Driver Circuit 30A Throttle With Potential Control

The high-power control circuit motor reversing DC motor speed controller circuit features soft start, relay switching of motor direction, and PWM speed control. I have shared the circuit before. There..

AD694JNZ 0.10V 4.20mA 0.5V 4.20mA Converter Circuit

Voltage-Current converter circuit AD694JN integrated circuit based on the circuit, fed through the 7815 regulator input voltage can be 18-35 VDC. The minimum value of the power supply for 0-10V..

RMS 100W Amplifier Circuit With Speaker Protection

The amplifier gained popularity with its ease of assembly, excellent repeatability and acceptable characteristics, while having a simple circuit, and of course the advantages of class-B (relatively high efficiency and..