In this article we are going to see how to build a microphone amplifier circuit with operational amplifier LM324. This circuit can be used as good pre-amplifier for audio projects. Selecting an Opamp The heart of the mic amplifier circuit is an op-amp LM324 which is quad op-amp moulded in single IC. We are going […]
Audio and Amplifier Projects
Make this Crystal Radio Set Circuit using No Batteries
A crystal radio circuit is probably the simplest form of radio that uses hardly any electronic components, and needs absolutely no external power for the operations. Crystal Radio Concept The only downside of this radio concept is the requirement of a very long antenna and a deep earthing, therefore this unit is not something which […]
5 Simple Preamplifier Circuits Explained
As the name suggests a preamplifier circuit pre-amplifies a very small signal to some specified level that can be further amplified by an attached power amplifier circuit. It basically acts like a buffer stage between the input small signal source and a power amplifier. A preamplifier is used in applications where the input signal is […]
Simple 20 watt Amplifier Circuits
This article is written with an intent to build a simple 20 Watt Amplifier. All the amplifier circuits presented below will provide a full output power of 20 watts into 8 Ohm loudspeaker. By: Dhrubajyoti Biswas Why a Single Ended Class-A Amplifier A single-ended Class-A amplifier is probably one of the best example when it […]
32 watt Amplifier Circuit using TDA2050
In this post I have explained how to build a simple yet powerful 32 watt amplifier circuit using a single chip TDA2050 and with a handful of resistors and capacitors. By: Dhrubajyoti Biswas Working Principle of TDA2050V This article will detail building a stereo amplifier along with an output for a headphone jack. It is […]
6 Simple Class A Amplifier Circuits Explained
In this post I have explained 6 simple, cheap class A power amplifier circuits which can be used for any small scale audio amplifier application. By: Dhrubajyoti Biswas 1) Zero Negative Feedback Amplifier This following data will detail how to build an amplifier having zero negative feedback which implies building a zero component amplifier. The […]