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 […]
Audio and Amplifier Projects
Simple 50 Watt Power Amplifier Circuit
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 […]
USB 5V Audio Amplifier for PC Speakers
Audio amplifiers which are designed to work with a 5 V supply from a USB socket such as from a computer USB are called an USB amplifiers. In this article I have explained how to build a simple 3 watt amplifier circuit which can be powered directly from a computer 5V USB port for driving […]
Loud Pistol Sound Simulator Circuit
The proposed circuit is an oscillator circuit designed to generate a loud pistol like sound over a loudspeaker. A pistol sound generator circuit presented here can be used as button operated starting sound during racing events or marathons, or simply to deter wild animals and thieves in remote areas. The concept could be also effectively […]
PIR Triggered Message Player Circuit
In this post we diagnose a PIR activated message player circuit, which was sent by Mr. Norman Kelley one of the dedicated followers of this blog for improvements. I have explained more about the design through the following discussions. Triggering Message Playback with a PIR Input I have been working on a project for about […]
1000 watt to 2000 watt Power Amplifier Circuit Diagram
In this article I will elaborately discuss a simple to built yet awesome 1000 watt amplifier circuit, which could be easily upgraded to achieve upto 2000 watt output. It uses relatively fewer components and could be quickly set up for getting a massive 1000 watt power output on any 4 ohm, 1kva loudspeaker. This circuit […]