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Archives for 2023

Sound Activated LED Lamp Circuit

Last Updated on April 11, 2026 by Swagatam 5 Comments

stairway light automatic

A highly sensitive sound activated LED lamp circuit can be built using just a few transistors and resistors. The circuit is actually a high gain MIC amplifier circuit which amplifies the external sound hitting the MIC. The amplified signal is then used to momentarily illuminate a bunch of LEDs. What does the Circuit do? Basically, […]

Filed Under: Lamps and Lights Tagged With: Activated, Lamp, LED, Sound

IC MP1584 Datasheet and Circuit Diagram

Last Updated on January 9, 2026 by Swagatam 34 Comments

MP1584 IC datasheet

The MP1584 is a high-frequency asynchronous step-down DC-DC buck converter IC manufactured by MPS (Monolithic Power Systems). This IC is widely used for applications which demand high efficiency and a compact form factor, for example operating portable devices, IoT modules, and other low-power electronics. Here’s the complete datasheet for the MP1584: Electrical Characteristics Pin Configuration […]

Filed Under: Datasheets and Components Tagged With: Datasheet, MP1584

IC 4027 Datasheet, Pinout Working, Application

Last Updated on December 25, 2025 by Swagatam Leave a Comment

4027 flip flop

The CD4027 is a dual J-K flip-flop IC with reset that can be used in a variety of digital logic applications. It has two independent flip-flops, each with a J and K input, a clock input, a reset input, and complementary Q and Q-bar outputs. The CD4027 operates on a wide range of supply voltages […]

Filed Under: Datasheets and Components Tagged With: 4027, Application, Datasheet, Pinout, Working

Design your own Sine Wave Inverter Circuit from the Scratch [Tutorial]

Last Updated on November 30, 2025 by Swagatam 46 Comments

the right way to interface SPWM with inverter MOSFETs

In this article I have explained comprehensively regarding how to design a sine wave inverter without any form of coding or complex circuit designs. The included designs are simple yet extremely precise with their sine waveform structure. You might have often felt discouraged, thinking that making a sine wave inverter from the scratch can be […]

Filed Under: Inverter Circuits Tagged With: Design, Inverter, Scratch, Sine, Tutorial, Wave

How to Connect Resistors in Series and Parallel

Last Updated on September 26, 2025 by Swagatam 36 Comments

combining resistors in series and parallel

There are three ways to interconnect resistors: series, parallel and in combination of series/parallel. When resistors are joined in series, the current passing via one resistor also passes through the next. When resistors are joined in parallel, they are wired across each other, resulting in the same voltage across each resistor. When resistors are connected […]

Filed Under: Electronics Theory Tagged With: Connect, Parallel, Resistors, Series

High Efficiency Solar Charger Circuits using Switching Regulators

Last Updated on July 5, 2025 by Swagatam 7 Comments

solar battery charger using 7805 switching regulator

Solar power or electricity from sun light is so abundant that we can afford to waste it or dissipate it in the form heat. This means that we can use large, high power solar panels to charge batteries with lower power without bothering about how much solar energy is being wasted and how much the […]

Filed Under: SMPS and Converters, Solar Controller Circuits Tagged With: Charger, Circuits, Efficiency, High, Solar, Switching

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