Audio Circuits are used to process and manipulate audio signals as required by the application. It is a combination of Audio Amplifiers, Audio mixers, Audio Frequency control and other similar circuits that involve audio signal handling. The below list consists of a huge collection of audio circuits with schematics and detailed explanation, to help you build Audio projects and use them for your Audio designs.
By Arun Kumar
Human–machine interaction today is heavily centered around speech.
Voice assistants, smart speakers, and voice-controlled home automation systems assume that the user can speak clearly and consistently.
However, this assumption excludes an important group of users:
People with speech impairments Individuals who are temporarily unable to speak Users with…
By Akash A S
The iBIGS (Infant Behavior Intelligent Guardian System) is a smart baby monitoring and sleep-aid device built using the Adafruit MEMENTO (ESP32-S3) platform. The system is designed to help parents monitor infants, detect crying or movement, and provide soothing sounds to help babies sleep.
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This DIY Bluetooth Speaker is a budget-friendly project that delivers clear wireless audio using affordable components. With the help of a DIY Bluetooth Speaker amplifier, the Bluetooth module sends the audio signal to the amplifier, which then provides the necessary power to drive the speakers. It can also be used for building a DIY Bluetooth portable speaker. The…
Voice recognition is becoming an essential part of the Internet of Things (IoT), allowing us to control, monitor, and interact with devices hands-free. At its core, ESP32 speech to text works by capturing audio through a microphone, processing it, and converting it into text that devices can understand. This text is then used to trigger commands, just like how…
Amplitude modulation (AM) was first introduced to enable long-range wireless audio communication, representing a major advancement over wireless telegraphy using spark-gap transmitters. Understanding what is amplitude modulation and how it works is fundamental for electronics engineering students and professionals working with radio frequency circuits. This…
Planning to buy a small voice recorder to record voices or sounds in an environment and store them in its memory? Think again! You can easily build your own voice recorder by following a few simple steps. This project focuses on building an Arduino Based Voice Recorder, which can also be abused as a spy bug. Our spy bug uses a small microphone…
As the winter season approaches, comes the festival of lights in INDIA. Yes, we are talking about Diwali, known for lighting up firecrackers. But they don't just light up the party; they also cause air pollution and bring health issues. So, to reduce pollution and improve our health we decided to build an Electronic Firecracker using Arduino which makes a loud sound…
In this article, we are going to discuss how to transfer audio through laser light. This is a fun little project, and the concept is similar to what we see in fibre optics cable. We will use a laser light to send data from one point to another. To be particular, in this project here, we are going to transfer our voice from one point to another by shining a laser light on a solar panel. This…
Adding sounds or music to our project will always make it looks cool and sounds much more attractive. Especially if you are using an Arduino and you have lots of pins free, you can easily add sound effects to your project by just investing in an extra SD card module and a normal speaker. In this article I will show you how easy it is to Play music/add sound effects using…
There are many ways to communicate between a product and a user, but the most common and popular choices for audio communication is the buzzer. The buzzer plays a very important role in electrical and electronic devices. We often encounter buzzers in common devices such as alarm clocks, doorbells, or other household appliances.…
The Bluetooth Amplifier Module is useful for DIY projects for creative and hobbyists. The module’s Bluetooth connectivity makes the project connect wirelessly and gives hustle-free entertainment. The board can work on Lithium-ion/Li-Po or Lead Acid battery, which is used to make the device portable. Its design makes it easy to implement…
For those who love tinkering with electronics, making a Bluetooth speaker from scratch can be a satisfying and fun experience. In this article, we'll learn a step-by-step guide on how to build your very own wireless Bluetooth speaker using basic electronic components under 9$ or 700rs. We have previously built many audio-related projects…
