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Newly Updated Circuit Projects:

5 Simple Electronic Dice Circuits Explained [Digital Dice]

Last Updated on December 16, 2025 by Swagatam 12 Comments

dice compressed

We all know what a dice is and how manually a dice is shuffled and thrown to get a random number. In older times when we did not have computer games or mobile games, we used to play with various indoor games that required tossing a cubical thing called dice having 1 to 6 dots […]

Filed Under: Games and Sports Projects Tagged With: Circuits, Dice, Digital, Electronic, Explained, Simple

How to Make a Dual Tone Siren Circuit

Last Updated on December 14, 2025 by Swagatam 15 Comments

DUAL TONE SIREN CIRCUIT

This two tone siren circuit explained here gives out a continuously varying high amplitude sound. Since the supply voltage is not critical, it can be used in cars, motor cycles or at home. It can replace the ordinary call bell. A dual one siren is an amplified alarm circuit designed to generate two different audio tones resembling […]

Filed Under: Audio and Amplifier Projects Tagged With: Dual, Siren, Tone

Single Transistor LED Flasher Circuit

Last Updated on December 14, 2025 by Swagatam 149 Comments

OneTransistorLEDFlasherCircuitDiagram2CImage

It is possibly the smallest LED flasher to date, which is able to flash an LED ON/OFF infinitely using a single transistor, a resistor, and a capacitor. Can you imagine making a great looking LED flasher or blinker with just a single transistor and a couple of other passive parts? That’s exactly what I have […]

Filed Under: Lamps and Lights Tagged With: Flasher, LED, Single, Transistor

Simple 48V Automatic Battery Charger Circuit

Last Updated on December 11, 2025 by Swagatam 422 Comments

The proposed 48 V automatic battery charger circuit will charge any 48 V battery up to an optimal 56 V full charge level, utilizing very ordinary components. The circuit is highly accurate with  its over charge cut off features. Circuit Description: As shown in the circuit diagram, the main element in the circuit is the opamp IC 741, which has been arranged as a comparator. Pin#3 […]

Filed Under: Battery Charger Circuits Tagged With: 48V, Automatic, Battery, Charger, Simple

Power Factor Correction (PFC) Circuit – Tutorial

Last Updated on December 10, 2025 by Swagatam 19 Comments

passive 2

In this post I have explained the different methods of configuring a power factor correction circuit or a PFC circuit in SMPS designs, and explains the best practice options for these topologies so that it complies with the modern PFC restriction guidelines. Designing efficient power supply circuits have never been easy, however in the course […]

Filed Under: Voltage Control and Protection Tagged With: Correction, Factor, PFC, Power, Tutorial

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

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