Category: Amplifier Circuit

20 Watt Audio Amplifier using TDA2003

Engineeering Projects
20w audio amplifier using TDA2003

Here is a simple circuit of the “20-Watt Audio Amplifier using TDA2003″ IC to amplify the weak audio signal. Various types of amplifier circuits have already been posted in the amplifier circuit section. The IC TDA2003 contains a pre-amplifier, driver amplifier, and output amplifier internally. Basically, TDA2003 is an improved version of TDA2002 with various features like very low harmonic distortion and high output current capability. Circuit Description of 20-Watt Audio Amplifier using TDA2003 The circuit of the 20-Watt Audio Amplifier using TDA2003 shown in figure 1, build around the…

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10-Watt Audio Amplifier

Engineeering Projects
Author prototype pcb of 10 watt audio amplifier

The Driver Amplifier amplifies the weak electrical signal from the microphone and makes it suitable for power amplification. Thus, an amplifier that is used before a power amplifier is called a driver amplifier. As all amplifier driver amplifier is also a cascade amplifier. Thus, by cascading multiple amplifier stages a project 10-Watt Audio Amplifier is built. Circuit Description of 10-Watt Audio Amplifier The project shown in figure 1 is of 10-Watt Audio Amplifier, which is basically a combination of various amplifiers i.e. pre-amplifier, driver amplifier, and a push-pull amplifier. Here…

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Audio Amplifier Circuit Using 555 IC

Engineeering Projects
Timer IC 555 based audio amplifier IC

As being electronics hobbyists we all know about timer IC 555. Timer IC 555 is one of the most popular IC of all time because of its application. This IC has various applications like clock pulse generator, time delay circuit, etc. Here, is another application of 555 timer IC i.e. Audio Amplifier using 555. We are going to use a 555 timer IC rather than a conventional amplifier IC because it has unique features like low audio distortion and high efficiency with a high base. PWM is the method by…

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Listening Bug Circuit using op-amp LM386

Engineeering Projects
listening bug circuit using opamp LM386

Listening bug? What is that? Is it what strikes your head, the first time you see this title? Well, allow us to clear your confusion. Listening bug is a resemblance to that concept improves the quality of sound we hear. Input sound collected by the condenser microphone with high-sensitivity is supplied to the Listening Bug Circuit and adjustable sound gain is obtained at its output which improves the quality of sound for obvious reasons. Now, people can hear everything smoothly without risk of interruption and no talks will be missed.…

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Eight Channel Audio Mixture with Multiple Control

Engineeering Projects
circuit diagram of audio mixture with multiple control

Here is simple circuit of eight channel audio mixture with multiple control using IC TDA 1524A and 747 to mix eight individual sound. The PCB for soldering side and component side is also given. The conventional sound systems involved recording of sounds from several musical instruments, each played by different musicians using only a single microphone. Then, in order to balance the sound tone, they had to alter the positions of musicians according to the microphone. Due to which people started to record directly to stereo master tape. However that…

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Low Power Audio Amplifier Using LM386

Engineeering Projects
circuit diagram of low power audio amplifier

The circuit and PCB Design of Low Power Audio Amplifier using LM386 is posted here which used to drive at most audio power of 1 Watt. LM386 is an low voltage, battery operated power amplifier designed for application where low voltage is main concern. The main advantage of using LM386 is it does not requires any ground reference voltage and it’s output is automatically biased to 1/2 of supply voltage. Circuit Description of Low Power Audio Amplifier Using LM386 To derive at most audio power of 1 watt at the…

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Electric guitar preamp circuit

Engineeering Projects
author prototype of guitar pre-amplifier box

The entire circuit of the ‘Electric guitar preamp circuit’ is divided into small sections to ensure simplicity and easy understanding of the project. The first section comprises a single transistor that serves as a common-emitter amplifier. Be it in melodious songs or in rock songs, the guitar is an inseparable part of music in today’s world. To extend the level of sound such that it can be heard by every individual in a mass, amplifier circuits are extensively incorporated into the music system. And this circuit represents a similar concept.…

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Telephone Amplifier Circuit

Engineeering Projects
circuit diagram of telephone amplifier circuit

Telephone talks are meant to be private or kept in between two persons engaged in the conversation. But, sometimes it is also necessary to have a group talk. The project entitled Telephone amplifier circuit serves us right. It is very simple, yet inexpensive and useful which uses very common power amplifier LM386 and some more components. The circuit can be used to produce loud sound to discuss or start a conversation in a group through telephone. Working of the  Telephone Amplifier Circuit The signal emitted as output from telephone is…

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Bass Booster Circuit using Op-Amp 741 IC

Engineeering Projects
bass booster circuit design

Here is one another basic project call bass booster using op-amp 741 IC. The circuit bass booster increases beat frequency without affecting high frequency. Description of Bass Booster Circuit using Op-Amp 741 IC The circuit of bass booster shown in figure 1 is divided into two main section i.e. bypass high frequency and boost section. The input of this circuit is connected to the output of pre-amplifier circuit and it’s output to input of power amplifier circuit. When audio signal is given to the input, high frequency is passed through…

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DIY Headphone Amplifier using 741 IC

Engineeering Projects
circuit diagram of DIY headphone amplifier

Various type of amplifier and pre-amplifier circuit has appeared in this website in amplifier and pre-amplifier section. The circuit posted here is of DIY headphone amplifier which is suitable for headphone or 8-ohm speaker or more impedance. The circuit is so designed that it has no risk of overloading or distortion of either the circuit or headphone. Circuit Description DIY Headphone Amplifier using 741 IC The heart of the circuit headphone amplifier is op-amp 741 which provide suitable gain where the transistor T1 and T2 are used to drive low…

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