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Audio and Amplifier Projects

The Perfect FM Radio Circuit using TDA7000 IC

Last Updated on April 26, 2025 by Swagatam Leave a Comment

Here we are going to see how we can build a very simple, yet perfect FM radio circuit using one single IC called TDA7000. This IC already has everything inside it, so we do not need to do too much headache wiring around it. First of all, before we build, we must understand what each […]

Filed Under: Audio and Amplifier Projects Tagged With: FM, Perfect, Radio, TDA7000

ISD1820 Voice Recording IC Datasheet, Circuit Diagram

Last Updated on April 16, 2025 by Swagatam Leave a Comment

The ISD1820 is a voice IC that lets us record voice from a mic and play it back using simple buttons or microcontroller. We can record between 8 to 20 seconds which depends on how we set it. This IC is used in small voice projects, talking toys, greeting circuits, voice alerts, and more. ISD1820 […]

Filed Under: Audio and Amplifier Projects Tagged With: Datasheet, ISD1820, Recording, Voice

What is ISD1820 Module? How to Connect and Use

Last Updated on April 15, 2025 by Swagatam Leave a Comment

The ISD1820 is a small ready-made module which can record human voice for short time and then play it back. It is based on the ISD1820 IC which is a voice record and playback chip. This module is very popular for DIY projects where we want to make some talking gadget or voice-alarm,or greeting system, […]

Filed Under: Audio and Amplifier Projects Tagged With: Connect, ISD1820, Module

Explained: MAX4466 Electret Microphone Amplifier Module with Adjustable Gain

Last Updated on March 14, 2025 by Swagatam Leave a Comment

In this post we will be talking about this MAX4466 microphone amplifier module, right? So this is a tiny little circuit that can amplify weak sound signals from an electret condenser microphone (ECM). That means it is going to take a very small electrical signal from the microphone and then boost it up so we […]

Filed Under: Audio and Amplifier Projects Tagged With: Amplifier, Electret, Explained, MAX4466, Microphone, Module

TV Antenna Amplifier Circuit Diagram to Boost TV Signal Reception

Last Updated on January 17, 2025 by Swagatam Leave a Comment

The following useful circuit of a TV antenna amplifier was sent to me by an avid reader of this blog Mr. Miljenko Farkas. I am extremely grateful to him for his kind contribution to this site. Here’s what he wrote in his email: Overview So this antenna amplifier is made to really enhance how well […]

Filed Under: Audio and Amplifier Projects Tagged With: Amplifier, Antenna, Boost, Reception, Signal, TV

Audio Clipper and Compressor Circuits Explained

Last Updated on January 18, 2025 by Swagatam 23 Comments

audio clipper circuit

In this article I have explained using circuit diagrams how a clipper and a compressor circuits work to processes an input audio signal as per the required output signal. What is an Audio Clipper An audio clipper circuit is basically used to alter or restrict the amplitude (volume) of an audio signal. There are mostly […]

Filed Under: Audio and Amplifier Projects Tagged With: Audio, Circuits, Clipper, Compressor, Explained

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