Audio amplifier project report pdf. • Build a prototype amplifier on Breadboard. 2 Specific project objectives. PROJECT REPORT EDA (12817) Prepared by Salman Khaliq Bajwa (3746) Hassam Haq ( ) Waqar Khokhar( ) Advisor Asstt. It will involve designing and etching a basic audio amplifier circuit board without integrated circuits that can output around 70 watts of power from a While these amplifiers work well in many situations, it is often desirable to design an amplifier that is much more energy-efficient. The. K- 2023122010 INTRODUCTION The objective of this project was to create a An operational amplifier ("op amp") is a direct-coupled, differential-input, high-. Project explanation, Calculations, Circuit Topology and Results are given in the Report. Basic PWM Operation. 10K ohm controls the volume to the input of the amplifier. SPICE Net-list. In the first section, types of power amplifiers have Dec 5, 2014 · This document describes the fabrication of an audio amplifier using the IC-LM386. We have classified this list into three parts:-. Nov 18, 2011 · In addition to basic op amp circuits like the Differential amplifier, Inverting and Non-inverting amplifiers, Summing amplifier etc. The document also Mar 6, 2017 · Audio amplifier • 3 likes • 4,154 views. Mar 20, 2022 · TDA2822 Dual Power Amplifier IC. The Author Apr 30, 2019 · Li-Fi is transmission of dat a using visible light by sendin g. Base-emitter voltage for ZTX450 May 21, 2024 · This configuration was chosen to effectively avoid a strange phenomenon of a typical Class D power amplifier called "pumping effect". It provides the circuit diagram and lists the components required, including the IC-LM386, capacitors, resistors, potentiometer, battery, speaker, and PCB board. This provides voltage for the second oscillator (across the 1k resistor) to drive a speaker. Oct 28, 2020 · Abstract and Figures. Devices that generally using audio amplifier is:- 1) Television Set : The basic speakers built into televisions are generally too small and inadequate to Apr 29, 2013 · LA4440 Stereo Amplifier. 40 dB, and the corner frequency of the LPF will be set to avoid attenuating audio signals by more than 1 dB across the audio spectrum. 3 Application of Audio Power Amplifier :- An audio amplifier is required in all the devices that deal with sound. The ST Microelectronics datasheet is the original . Th e idea of Li- Fi was. The gain is internally set to 20 to keep external part count low, but the addition of an external resistor and Feb 10, 2017 · For our project, we set out to design an audio amplifier. Jan 2, 2020 · TSriyaSharma. Non-Inverting Audio Amplifier with dual power supply. It amplifies the audio signal to some extent. If you are using Easy EDA, which you should, add these parts to your build plate from the library: LM386N-4/NOPB. term "operational" dates back to the early days of analog computers when these devices. Once reached, leave the Pre-Amp POT permanently in that position v. com LM386 Low Voltage Audio Power Amplifier General Description The LM386 is a power amplifier designed for use in low volt- age consumer applications. This audio signal is then given to the base of the transistor through the 100uf capacitor. Project Report - Audio Mixer - Free download as PDF File (. It includes a circuit diagram and lists the components used, which are a circuit board, transformer, capacitors, potentiometer, voltage regulators, amplifier chip, resistors, speaker, and audio cable. It then explains the working principle of the circuit, describing the role of each pin of the IC-LM386 Aug 29, 2018 · The cut-off frequency is calculated at -3dB, so we want it to be a bit higher in order to not filter sounds that we want to hear. 1 Overview. If you don’t already have it, I recommend downloading and reading the datasheet for the TDA2003. pa audio amplifier lab report - Free download as PDF File (. Then factor in your transformer’s regulation and the variation in your mains voltage. Copper Bottom Layer. collection of single supply operational amplifiers utilizes a virtual ground of 6 volts, created by a Figure 1: General block setup for current design showing three major design components: initial sound pick-up, conversion of acoustic sound to electrical signal, and amplification, filtration, and audio sound of the signal Esther Leah Carreon. Insert remain wire of 3. Afaque Manzoor Soomro July 20,2016 This document discusses using the IC 741 operational amplifier in audio amplifier circuits. Jan 29, 2017 · REPORT AUDIO AMPLIFIER Project Report Fri Jan 16, 2015 Mudasser Raheem 2013-EE-36 SECTION “A” Electrical Engineering Department University of Engineering & Technology Lahore-Pakistan 2. In addition, a high value resistor between the signal input and GND (10KΩ in the schematic) acts as a pull-down resistor that drives the input to ground when a source isn't connected. Calculations are shown for Class D amplifier uses MOSFETs that are either. Jan 25, 2022 · Fig 2. This paper presents a new audio amplifier that imposes voltage on the speakers. Audio Power Amplifier Project - Free download as Powerpoint Presentation (. From the graph above, it also shows that the power amplifier is actually a low pass filter. 5 to 12 volts DC. The document discusses different types of power amplifiers including RF power amplifiers which convert low power RF signals to higher power signals for transmitting antennas, linear power amplifiers, and FET communication power amplifiers. Multisim Simulations and hardware of an audio amplifier. 325 Watts. 4 Ω to 32 Ω. And this might be a gain of about 100. Sep 18, 2019 · The LM386 is an integrated circuit containing a low voltage audio power amplifier. Class D switching stage. The first two transistors form a high-gain amplifier with feedback via the 4u7 to produce a low-frequency oscillator. Actually there are two different datasheets. Jul 6, 2012 · LM386 LM386 Low Voltage Audio Power Amplifier Literature Number: SNAS545A docsity. power applicat ions. The circuit is very Audio Amplifier Project Report Pdf Rui Ma Audio Power Amplifier Design Douglas Self,2013-07-04 This book is essential for audio power amplifier designers and engineers for one simple reasonit enables you as a professional to develop reliable, high-performance circuits. pdf) or read online for free. The signals are capacitor coupled through C2. Download Free PDF. 2 AC Conditions. M LM386 Audio Amplifier Made By: Ayush Jain (201601404) Rutvik Kothari (201601417) Dhruvesh Asnani (201601423) This report contains the following: 1) Introduction 2) About LM386 3) Components Used in The Circuit 4) Working of Audio Amplifier 5) Applications Introduction An audio amplifier is an electronic device that increases the strength This report covers the fields of Analogue Electronics and Technological Plasmas. a project report on design and implementation of audio amplifier for personal stereo a thesis submitted in partial fulfillment of the requirements for the amiete in electronics and telecommunication engineering submitted by : shahid ajij sg - 192552 under the guidance of mr. It is best to choose something between 40 and 60 kHz. These signals passes through the capacitor that regulates these signals and then pass them to the LM386. The circuit analysis is presented and procedures for implementation are Amp Stage Volume Figure 3: Amplifier block diagram. We can use volume control and treble control in this circuit. Inverting Audio Amplifier with dual power supply. It begins by stating the objective is to design an audio amplifier using an LM386 audio power amplifier IC. Jan 1, 2012 · The LM1875 is a monolithic power amplifier offering very l o w distortion and high quality. With continued process scaling, CMOS has become a viable technology for the design of high-performance low noise amplifiers (LNAs) in the radio frequency (RF) regime. The circuit uses 4 identical common emitter gain stages with a gain of 10 each, for a total variable gain of 0 to 2000. Jun 13, 2019 · If you want to built simple audio amplifier without messy components then you can construct simple single transistor audio amplifier circuit using BC547 and Resistor, Capacitor. 0 Introduction to Amplifier Design. This project will cover the design, construction, and testing of an analog filter meeting the ITU-R BS. This document discusses using the IC 741 operational amplifier in audio amplifier circuits. The L M386 (Fig ure 1) is a low-pr iced power amplifier that. ON or OFF. The BTL power output is 300watts at 8Ω with ±37VDC PS rails. Printed Circuit Board Layout. Dec 28, 2020 · The first is a stereo amplifier that will output 7 Watts per channel. Plus, Find Helpful Diagrams, Step-By-Step Instructions, and More. So we can have four design for 741 op-amp audio amplifier as follows, 1. The first stage is a voltage-divider biased common –emitter stage with a swamping resistor to control the gain of the first stage and thus also the gain of the second stage. Part 1 (Due 3/29/2019) - Lab Report (. The transistor magnifies the audio 8. Jun 23, 2021 · The working of the LM386 Audio Amplifier starts with the audio signal generation of audio generator. The audio signal also needs its own path to GND. Thus, we can analysis the system and trouble shoots the problem easily. The document proposes an audio amplifier project to be completed by five students. PCB Assembly Diagram. Power amplifiers may be called upon to supply power ranging from a few watts in an audio amplifier to many thousands of watts in a radio transmitter. pdf MOHD RAZALI BIN BAHARON MUHAMMAD THORIQ BIN MOHAMAD ZAID MUHAMMAD SYAFIQ SYAFIQ BIN YUSOFF VIKNESWARAN NAIDU En. txt) or view presentation slides online. 5 mm jack at pin3. IC1 is the micro power audio amplifier that works between 4. This Dec 19, 2020 · The LM386 is a low power audio frequency amplifier which is very commonly used in small audio amplifier circuit project. In addition, the amplifier had to be produced at a low cost with available materials. than the human eye can follow. 5 mm jack at negative terminal of capacitor. The gain is internally set to 20 but it can be modified from 20 to 200 by placing a resistor and capacitor between pins 1 and 8. LA4440 is a two channel audio power amplifier IC with inbuilt in dual channels enables it for stereo [] Explore Our Collection Of Simple Audio Amplifier Circuits, Projects, and Schematics. 3) LM324 Op Amp Circuits. May 20, 2012 · Audio Amplifier B. pdf), Text File (. This project report describes the design and development of an audio amplifier using a power supply. 5mm Jack. 1 Class-B Amplifier This lab introduces two amplifier topologies: The Class-B amplifier, and the Class-AB amplifier. Structure. Manufacturers. 1 IC LM 386. COMP. The Class-B amplifier consists of two transistors in a push-pull configuration. understand op amp parametes input bias current and offset current and voltage define and calculate comman mode rejection ratio and also Mar 6, 2017 · Audio amplifier • 3 likes • 4,154 views. It is able to deliver up to 30W of power using an 8 ohm load and dual 30V DC power supplies. -The op-amp, R1 and R2 are configured as a non-inverting amplifier, and provide voltage gain, while the NPN/PNP transistors configured as back-to-back emitter followers provide power gain. The circuit allows three audio input signals to be mixed into a single output signal. Mar 11, 2015 • Download as DOCX, PDF •. This thesis presents design and simulation of LNA at 180nm and 90nm technology. Connect remain wire of speaker to +5v Nov 6, 2016 · Audio Amplifier. Now you can freely turn the Power-Amp POT to act as your normal Volume Knob Additional Submission Details: 1. 4v t o 12v and c apable of providing voltage gain. It can easily drive an 8 Ω speaker or two 4 Ω speakers. Aug 26, 2016 · Li-Fi Audio Transmission Project Report. 1. But the electrolytic in the feedback (BOOTSTRAP) line feeds-back a signal as high as 100 x 100 times! In fact it feeds back a signal that COMPLETELY changes the state of the two transistors. M Mar 11, 2015 · mini project on CLASS D AUDIO POWER AMPLIFIER. December 10, 2023 by John Woodgate. The document also 1. For amplifying purpose it used an IC and few more components. Insert one wire of 3. E. The quality factor Q = 1 √2. 3 likes • 2,668 views. Oct 28, 2016 · Project Report Audio Amplifier Department of Electrical Engineering Sukkur IBA By: Zeeshan Ahmed 033-14-0062 Raheel Nadeem 033-14-0074 Shahryar Prepared for Sir Engr. Key components of the circuit include potentiometers to control the FET gates, resistors to protect the FETs and set signal levels, and capacitors. 3. doc / . for processing signals from a small microphone and driving a small speaker. Discuss in detail the differences between the following Audio Power Amplifier Classes: Class A, B, AB, C, and D b. The second is a bridged amplifier that can output 14 Watts per channel. Introduction. It is built around popular amplifier LM386 (IC1), an 8-ohm, one-watt speaker (LS1), four capacitors and a few other components. The main objective of this study is to investigate common power amplifier classes which are class A, B, AB, C and etc. docx), PDF File (. LM386 Audio Amplifier Report - Free download as Word Doc (. The pre-lab involves calculating the design specifications for 3 amplifiers based on given parameters, with amplifier 1 Document Audio amplifier. Ultra-low noise LDOs are recommended to drive the DAC and amplifiers. Ir. The main purpose of the project is to design and build a power amplifier which is built using high power semiconductors in Class AB topology. from 20 to 200. Circuting : First place transistor on breadboard . SPICE Plot Export - AC analysis. It can drive loads from. It offers low crossover distortion, low quiescent current and is available in an 8 pin plastic dual in-line package. May 3, 2023 · Building a Circuit to Measure the Effect of Noise on Audio Signals. The most common package for LM386 is an 8 – pin DIP. It explains the potentiometer is used to vary the gain or volume, and describes the construction and working of a potentiometer. Inverting Audio Amplifier with single supply. Mar 6, 2017 · REPORT AUDIO AMPLIFIER Project Report Fri Jan 16, 2015 Mudasser Raheem 2013-EE-36 SECTION “A” Electrical Engineering Department University of Engineering & Technology Lahore-Pakistan 2. These are the formulas used to calculate the values of the inductor and the capacitor: L = RL√2 2 ⋅ π ⋅ fc. 2) LM741 Op Amp Circuits. The output gain Feb 1, 2000 · Abstract. load on The third part of the lab investigates the use of op-amps as power amplifiers, with the first circuit shown below in figure 5. Title 621. 2. The pre This document is a mini project report submitted by students to partially fulfill requirements for a Bachelor of Electronics Engineering degree. Insert positive terminal of capacitor at pin1 of transistor . The speaker is thus the load. 700 Watts. The amplifier was created to be used for auxiliary audio players. LM386N-4: 1. The input can come directly from a CD audio player or similar device, and typical 8 Ohm speakers are driven. The IC inputs these signals, the pin 6 of the LM386 is connected with the DC Source hence it powers it up. performance f o r consumer audio appli c ations T he LM1875 delivers 25 watts into a 4Ω or 8Ω. 1 DC Conditions. The LM386 is a mono low voltage amplifier that can be used in a variety of applications. 2 Design Example. Engineering. Apply 9 Volt DC supply for better result. The TDA2822 is a dual low power audio amplifier IC that can be configured in stereo mode or bridge mode. The IC consumes very little power, and it can be operated by a 9V battery. Huawei Technologies CO. introduced Mar 6, 2019 · Download audio-Power-Amplifier-Project. EE43 Fall 2005 – Project 1: Audio Amplifier, Part II 3 Measuring the Transfer Function Set the treble, bass, and volume knobs to something interesting (not a flat response – distort it slightly). More details» Upcoming Project. The LNA function is used to amplify signals without adding noise. This project is part of an electronics introduction class for undergraduate students and it has two main objectives: first to teach basic electronic circuit design concepts and second to motivate the students into choosing to learn more about analog 1. Applications. 3 Testing the Amplifier. Frequency (Hz) Vin Vout dB 50 Dec 1, 2015 · This paper reports the design and implementation of a 300Watt audio amplifier. This project report describes the design and implementation of an audio mixer circuit using field effect transistors (FETs). If the LED is on, the photo detector registers a binary one; otherwise it‟s a binary zero. docx from AA 1Audio Amplifier Design Report Author: Eva Dellow Organisation: Aston University Date: 26/3/18 Version: 1 1. 1 of 32. Audio-Amplifier. 4 Audio Amp Stage The circuit used to implement Figure 3 is rather complicated, and we’ll build it up in two pieces. Although we used a low-power speaker, we needed to achieve approximately three times gain over the entire circuit. 5mm connector. The amplifier topology is based on two current sources that modulate the desired voltage waveform on a Apr 4, 2015 · The chip has options for gain control and bass boost, and it can also be turned into an oscillator capable of outputting sine waves or square waves. • Calculate suitable values for AC components. Power amplifiers — Design I. It is suitable for battery-powered devices such as radios, guitar amplifiers, and so on. The report includes the objective 2. Read more. 5 Power Supply Design. The heart of this amplifier is IC LM 386. Dec 25, 2015 · Abstract and Figures. amplifier with similar capabilities and characteristics to those found most in modern, expensive high end commercial amplifiers. 12 V Male headphone jack 10k 220 uF 220 uF LM386 Female headphone jack 2 3 5 6 10 uF 4 7 Figure 4: Audio power amplifier circuit. To find the maximum supply voltage, take the peak output voltage and add the voltage drop (Vod) of the LM3886 (4 V). Since an audio amplifier system is a complex system, we divide it into several subsystems like VCA, PA, VU meter and so on. We need to supply an audio signal to the +Input of the amplifier (pin 3). 2) Details of a Class AB power amplifier circuit Proposal - Free download as Word Doc (. This is another audio power amplifier project in the series that uses an op-amp in the input stage. understand op amp parametes input bias current and offset current and voltage define and calculate comman mode rejection ratio and also Audio power amplifier design handbook. 2. Key sections include: 1) An introduction describing different types of amplifiers including weak-signal and power amplifiers. The input to this circuit is given through the mobile phone or pc or any device which have 3. Abstract The summary should be a 2-3 Apr 17, 2019 · Circuit diagram of the LM386 based audio amplifier is shown in Fig. 1) Basic Op Amp Circuits. gain voltage amplifier, usually packaged in the form of a small integrated circuit. iv. Insert resistor at pin 1 and 2 of transistor . The class-D audio system will have a passband of 20 Hz to 20 kHz and a switching frequency (fS) of 250 kHz. A 6V battery is used to power this project. This circuit detects darkness and produces a beep-beep-beep alarm. Four electrolytic capacitors [two 10µF, 16V (C1 and C2) and two 220µF, 16V (C3 and C4)] are used in Abstract: This paper presents the design of an audio power amplifier as a class project for undergraduate students of electrical engineering. SPICE Simulation. Single BC547 (NPN) Transistor based audio amplifier Mar 24, 2022 · This simple basic audio amplifier circuit first receives a low input audio input signal of any kind with the help of a 3. 1 of 56. LM386N-3: 0. Dec 3, 2016 · The common emitter amplifier schematics. It is designed to operate with minimum external components with current limit and thermal shutdown protection features . PWM technique is used to express analog audio signals with ON or OFF states in output devices. Jan 5, 2024 · Abstract. The inputs of our circuit were stereo signals from a portable music player. Section 2. A low pass filter is necessary in an audio amplifier circuit to remove unwanted signals, signals>200kHz, which is inaudible to a person. To generate a sound output out of any device we need a audio amplifier. Chairulsyah Wasli D020710041 D020710008 D020710004 D020710007 A device that actively boosts, or amplifies, a signal so that the output signal is a function of, and is of greater strength than, the input signal. were employed in circuits that performed mathematical operations such as addition Step 1: Designing the Circuit! Time to design the circuit! I am using Easy EDA as it's the superior PCB design software; however, this circuit could be just as easily made in Eagle CAD or Fritzing. data through an LED light bulb that varies in intensity faster. This report contains specific background about types of audio amplifiers, designing methods, experiments,simulations and results, tables and figures, conclusions, references and appendices. Few videos of its working are given in the Videos Folder. Nov 2, 2017 · This document summarizes the design and implementation of a 40W audio amplifier. The calculations for gain, lower cut-off frequency and higher cut-off frequency are as follows: Collector current vs. The amplifier is incorporated with a speaker as the output. 3 81535 Library of Congress Control Number: 2006927666 ISBN-13: 978-0-7506-8072-1 ISBN-10: 0-7506-8072-5 For information on all Newnes publications visit our web site at www. LM386 is a low voltage power amplifier with an inactive power draw of 24mW, which makes it suitable for battery controlled applications. Is the development and implementation of a system of controlled cooling and optimizing the power consumption Abstract of Design Project Stereo Amplifier By Ben Ruppel This report covers the design and implementation of a multi-stage stereo audio amplifier with its own voltage regulator, LED display, and digital volume control for each channel. — 4th ed. The IC 741 is a general purpose operational amplifier that can be used to build basic audio amplifier, preamplifier, and tone control circuits. •• Design a BJT class A common emitter audio amplifier. Introduction The objective of this project is to design a reliable close-loop control audio amplifier system with user-friendly interface. 00 Watts. LM386 is an 8 pin Pow er amplifier IC suited f or low. Li-Fi is transmission of data using visible light by sending data through an LED light bulb that varies in intensity faster than the human eye can follow. It provides examples of simple audio amplifier circuits using the IC 741, including a bass booster circuit and variable frequency oscillator. LM386 Audio Amplifier Made By: Ayush Jain (201601404) Rutvik Kothari (201601417) Dhruvesh Asnani (201601423) This report contains the following: 1) Introduction 2) About LM386 3) Components Used in The Circuit 4) Working of Audio Amplifier 5) Applications Introduction An audio amplifier is an electronic device that increases the strength IJERA Journal. To design three class AB power amplifiers with feedback-pair complimentary symmetry output driven by an active 3-way cross-over network and a pre-amplifier. pdf, Subject Electrical Engineering, from International Institute of Information Technology, Length: 18 pages, Preview: AUDIO AMPLIFIER PROJECT REPORT SREEVIDHU RITHWIK YARRA- 2022102012 CHIRANJEEVI. newnespress. Eagle CAD Design Rules. The amplifier has been designed to use two stages. Professor, Amir Hasan Khan College of Engineering PAF-Karachi Institute of Economics & Technology Karachi Apr 1, 2019 · 1. LTD. It describes the objectives of designing a compact, high fidelity amplifier and lists the requirements. This circuit can drive 8 ohm loud speaker and produce considerable sound. It has a wide supply ran ge f rom. Figure 1 shows a Jul 1, 2019 · Request PDF | Final project report: Design and implementation of a class D power amplifier with digital high-pass filter | The present report exposes the way in that was designed a class D power What you’ll learn in Module 2. The second stage consists of a Darlington voltage-follower configuration. Nov 24, 2021 · Audio amplifier with 741 can be build in inverting and non-inverting mode with dual and single supply. HiFi DAC requires ultra-low noise voltage reference and power supply; < 3 μV rms noise (20 Hz to 20,000 Hz) and high PSRR and CMRR (> 80 dBc at 20 to 20,000 Hz) are desirable for the system. Driving low impedance loads is not a problem with this amp and with an estimated output power of about 150W on an 8 ohms load, this amp has plenty to give and the headroom you’ve always wished for. This IC can operate over a wide range of supply voltages ranging from 3V to 15V. This project is a simple audio amplifier. In most amplifier circuits, the signal is increasing due to the gain of the transistor. Analysis Screen-shots. Mixing console. Insert one wire of speaker at pin2 . The system features also include an LCD. txt) or read online for free. Audio amplifiers — Design 2. View Audio Amplifier Report Template (1). Set up the signal generator and oscilloscope as described in the lab guide, and measure the transfer function. Since the project is to amplify audio signals, the bandwidth of the power amplifier is about 200Hz to 13kHz. This document discusses the design of an audio amplifier. The amplifier has the gain set internally to 20 to keep the Mar 4, 2024 · LM386 IC has been in use for decades and is still being used as Amplifier in Computer speakers and Portable Stereos. The total power of the three power amplifiers should some up to a total of 100W each driving a resistive load of 8 ohms. This project outlines the design and implementation of a discrete audio amplifier tailored. The document summarizes a student project to design a multi-stage amplifier circuit. The pass-band attenuation of fS should be. This document describes an audio amplifier circuit that uses an LM386 integrated circuit. It contains 3 sections: [1] an introduction to audio amplifiers, [2] details about the LM386 IC including its pin diagram Jan 22, 2021 · 6. com Printed and bound in Great Esther Leah Carreon. The first piece to build is the audio Audio Amplifier-project Report - Free download as Word Doc (. ppt), PDF File (. this is a mini project i done when i was in campus for BSC degree in electrical/communication engineering. The output signal of comparator goes high when the sine wave is higher than the sawtooth. pdf. , the list also features practical Op amp projects for the real world. It then provides details on the components, construction, and working of the audio amplifier circuit. This document describes the procedures for designing and building a public address (PA) amplifier in 3 parts: 1. Central Library | CIT Kokrajhar 2 ABSTRACT The aim of this report is to explain audio amplifier project which performed in EE 492 Design Project II course. Coil L1 and the trimmer capacitor form the tuned circuit to tune the receiver to the best FM station with strong signals. It describes the design and implementation of an audio power amplifier. is designed for use in low voltage consum er applications. There are three varieties of the LM386, each with different output power ratings: LM386N-1: 0. The key components of the amplifier are then specified, including the use of a constant current source, differential amplifier, driver stage and output stage. recognize the main properties of an operational amplifier. 468-4 specification, which aims to evaluate the disturbing effects of noise on audio broadcast signals. 4. This project focuses on the control of audio power amplifiers. pdf) a. LPF. Oct 14, 2016 · This is the voltage the amplifier needs from the power supply to get the desired output power. Li-Fi audio transmission is the transmission of wireless data by using visible light as a medium of communication in which the receiver section interprets the incoming light which is detected using a solar panel and converts to the audible sound signal with the help of a speaker. The capacitor triggers the NPN transistor therefore the transistor starts operating. This audio power amplifier project is based on LM1875 amplifier module from Texas Instruments. Li-Fi stands for Light-Fidelity. mdmtaarutopoquypsbpi