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How to Design Simple LED Driver Circuits

Last Updated on July 5, 2025 by Swagatam 101 Comments

capacitive LED driver with 50 LEDs

In this article I have explained how to design your own customized, simple LED driver circuits at home. We will learn how to calculate specific LED configurations for applying the LEDs with appropriate LED driver power supplies. In these driver power supplies I have explained two concepts one by using SMPS boards and the other […]

Filed Under: Lamps and Lights, SMPS and Converters Tagged With: Circuits, Design, Driver, LED, Simple

DC to DC Converter Circuits using SG3524 [Buck, Boost Designs]

Last Updated on July 5, 2025 by Swagatam 50 Comments

SG3524 boost converter compressed

A DC to DC converter is basically a switch-mode power supply, designed to work either as a boost-converter to step-up a low voltage DC to a higher voltage DC, or as a buck-converter to step-down a higher voltage DC to a lower voltage DC. The switched mode conversion ensures that the power transfer in the […]

Filed Under: SMPS and Converters Tagged With: Boost, Buck, Circuits, Converter, DC, SG3524

Simple IC 4017 Circuits

Last Updated on July 2, 2025 by Swagatam 30 Comments

4017 IC image compressed

The IC 4017 is a versatile counter divider IC which can be applied for making many different interesting electronic circuits. In this post I have explained about a few useful yet simple 4017 IC circuits and projects, assorted and compiled from this blog. How to Understand IC 4017 Pinouts Before we delve into the many […]

Filed Under: Mini Projects Tagged With: 4017, Circuits, Simple

Clap Switch Circuits with Relay ON/OFF: [Tested]

Last Updated on June 27, 2025 by Swagatam 226 Comments

clap switch

The clap switch circuits explained here will toggle a connected load ON and OFF in response to alternate clap sounds? Here I have explained 4 unique and simple designs which can be selected as per user preference. The article talks about what the title suggests – a clap switch. A small electronic circuit when built […]

Filed Under: Sensors and Detectors Tagged With: Circuits, Clap, OFF, ON, Relay, Switch

Tuned Radio Frequency (TRF) Receiver Circuits

Last Updated on June 21, 2025 by Swagatam 15 Comments

hiw to wind Li and L2 compressed

A tuned radio frequency receiver (or TRF receiver) is a form of radio receiver which is made using a number of tuned radio frequency (RF) amplifier stages accompanied by a detector (demodulator) circuit to draw out the audio signal, along with an audio frequency amplifier for amplifying the extracted audio into a loudspeaker. This kind […]

Filed Under: Audio and Amplifier Projects Tagged With: Circuits, Frequency, Radio, Receiver, TRF, Tuned

AC Motor Speed Controller Circuits using Back EMF

Last Updated on May 19, 2025 by Swagatam 57 Comments

drill speed controller circuit

In this post I have explained a few circuit diagrams for building AC motor speed controller circuits using back EMF concept. Working Principle of AC Motors So now, all those home type appliances like electric drill machines, sander machines, sewing machines, food mixer machines, etc. they all are mostly using that AC motor which is […]

Filed Under: Motor Controller Tagged With: AC, Back, Circuits, Controller, Motor, Speed

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