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Newly Updated Circuit Projects:

SCR Shunt Circuit for Protecting LED Drivers

Last Updated on August 20, 2019 by Swagatam 38 Comments

shunt

The post presents an effective method for protecting capacitive LED driver circuits through an SCR shunt regulator circuit and explains how it can prevent filter capacitors from blowing of and LEDs from getting destroyed. The remedy was requested by Mr. Max Payne. Protecting High Watt LEDs Please suggest regarding 3W, 5W LED bulb circuit design fault. […]

Filed Under: Power Supply Circuits Tagged With: Drivers, LED, Protecting, SCR, Shunt

Simple Surround Sound Decoder Circuit

Last Updated on May 15, 2026 by Swagatam 56 Comments

haffler

This article is written with an intent to explain in detail behind the making of a simple surround-sound decoder circuit. By: Dhrubajyoti Biswas Overview The concept of the decoder was first introduced by David Hafler in the 70s. His research illustrates the way to use two speakers as rear speakers on a surround system. The […]

Filed Under: Audio and Amplifier Projects Tagged With: Decoder, Simple, Sound, Surround

How to Make TDCS Brain stimulator Circuit

Last Updated on May 25, 2026 by Swagatam 32 Comments

brain mapping

In this article I will show how to construct an interesting project, which could potentially enhance your brain’s capability. I have explained how to make a TDCS brain stimulator circuit. Overview This may sound like science fiction, where an evil scientist connects his head to some complex machine and gaining super human capabilities. This may […]

Filed Under: Health related Projects Tagged With: Brain, Stimulator, TDCS

Kiln Temperature Controller Circuit

Last Updated on January 4, 2024 by Swagatam 3 Comments

kiln 2

A programmable sequential timer along with a triac dimmer is configured for making this kiln temperature controller circuit, further details are explained in the following article. The idea was requested by Mr. Joe. 220V Kiln Controller with Timer I’m hoping you have some time to have a crack at a design I’m after. I’ve been […]

Filed Under: Temperature Controllers Tagged With: Controller, Kiln, Temperature

433 MHz RF 8 Appliances Remote Control Circuit

Last Updated on March 16, 2021 by Swagatam 90 Comments

In this post I have explained a circuit which can be used for controlling 1 to 8 appliances with a single RF 433MHz remote control handset. Now you can control fans, lights ACs, oven etc within a range of 50 meters with the same remote. In a few of my earlier posts I have comprehensively […]

Filed Under: Remote Control Circuits Tagged With: 433, Appliances, Control, Remote, RF

Simple 50 Watt Power Amplifier Circuit

Last Updated on May 15, 2026 by Swagatam 14 Comments

50watt

A simple 50 watt amplifier circuit is I have explained below, I have explained how to build it at home using this versatile single amplifier chip LM3876T By: Dhrubajyoti Biswas UPDATE: For 40 watt amplifier circuits please visit this link. Analyzing the Circuit A good power amplifier is a necessity, especially when it comes to […]

Filed Under: Audio and Amplifier Projects Tagged With: Amplifier, Power, Simple, Watt

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