Find below is the list of audio amplifier circuits.
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…
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…
Recently, we thought of building a simple FM receiver circuit, so, like always, we started googling for possible circuits that can be used to fulfil our requirements, and as expected, we found a lot of circuits on the internet, but the question remains, how good or useful will they be when we put those circuits to the test? Because just like us, we found a lot of…
An audio amplifier is an Electronic circuit that amplifies low-power audio signals to a level suitable for driving Loudspeaker. These Amplifiers are used in wireless communications and broadcasting, and in audio equipment of all kinds. There are many classes of Amplifiers and we have previously built a lot of Audio Amplifier circuits ranging from small…
The TDA7294 IC is a popular sound amplifier IC with low cost that has a ton of power handling capacity, 100W to be exact. For this tutorial, we are going to use two of those TDA7294 ICs in a bridge configuration to build an even more powerful amp that can handle up to 170W of RMS power. Throughout this tutorial we will walk you through the…
We are living in the era of 5G and 5G-enabled devices; however, old technologies like the walkie-talkie system and RF communication system are still paramount in scenarios where a remote, short-distance, cheap, and low-cost communication is required. For example, if you have a building or heavy-weight bearing construction company, then your workers need to communicate with…
The need for home security alarm systems nowadays is a serious demand. As the number of crimes is increasing every day, there has to be something that will keep us safe. A motion sensor dog barking alarm can be a great choice for that purpose. The sound will alert you when someone approaches the house. They can also deter burglars from deciding to enter a home.
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DIY Music players are fun to build, and we previously built a few music players using Arduino and a dedicated MP3 module. Now we are using the ESP32 speaker output to build an interesting audio player, in which you can add sound effects by just connecting an extra speaker to the ESP32. Here we will use LM386 and a speaker with ESP32 to play music files. The audio…
