In this project, we will show you how to build lm386 audio amplifier circuit. Simple mic audio amplifier can amplify sound that is given from microphone. This is an old chip that has been a popular choice for lowpower audio applications for many years. Diy kit lm386 super mini audio amplifier circuitmix. Dec 04, 2017 share on tumblr the lm386 is a power amplifier integrated circuit designed for to use in low voltage applications. Lm386 audio amplifier circuit this is a simple audio amplifier circuit here,based on lm386 op amp chip it performs very good and the circuit does not use too many components. This is the best and interesting circuit for the beginner. A unique input stage allows ground referenced input signals. Lm386 audio amplifier circuit working and pin of lm 386.
The integrated chip lm386 is a low power audio frequency amplifier requiring a low level power supply most often batteries. But this voltage gain can be raised up to 200 vu 200 by adding external parts. Lm386 low voltage audio power amplifier december 1994 lm386 low voltage audio power amplifier general description the lm386 is a power amplifier designed for use in low voltage consumer applications. Cg is a 10 f electrolytic capacitor, which enables the gain to be 200. To make the lm 386 more flexible, two pins 1and 8 of the audio amplifier are provided for gain control and gain adjustments. Ic lm386 audio amplifier pin configuration and its. Lm386 audio amplifier circuit diagram circuitspedia. Here this circuit uses a mobile phone as the audio source with the help of the 3. Page 1 of 1 his is a 1 watt mono amplifier module kit using the. Here is the circuit that i am using for the lm386 amplifier chip. Lm386 based audio amplifier full project with circuit available. Fm receiver kit and audio amplifier using lm386 build circuit.
Here, in the above diagram lm386 audio amplifier circuit using transistors, r1 is a potentiometer, which is used as a volume control for the audio signal. Circuit lm386 audio and rf probe amplifier signal tracer. Free shipping 10pcs lm386n4 ic amp audio pwr 1w mono ab 8dip 386 lm386. Lm386 based audio amplifier full project with circuit. The lm386 is a low voltage audio amplifier ic manufactured by national semiconductor. The gain is internally set to 20 to keep external part count low, but the addition of an external resistor and capacitor between pins 1 and 8 will increase the gain to any value from 20 to 200. The lm386 audio amplifier is a general purpose singlechannel audio amplifier that can handle up to 700mw and is easy to use. The gain is internally set to 20 to keep external part count low, but the addition of an external resistor and capacitor between pins 1 and 8 will increase the gain to.
How to build small, simple audio amplifiers using ic lm386. There are three versions of this ic, lm386n1, lm386n3, lm386n4, capable of providing power output of 0. The gain is internally set to 20 to keep external part count low, but the addition of an external resistor and capacitor between pins 1 and 8 will. The paper proposes the development of a guitar audio amplifier that is made from a lowpriced ic lm386 chip, this amplifier can also be used for radios and other electronic projects ic lm 386 is a. Nsc, alldatasheet, datasheet, datasheet search site for electronic components and semiconductors, integrated circuits, diodes, triacs, and other semiconductors. Great sounding lm386 audio amplifier with bass boost. I am new to the world of audio amplifiers however i am quickly trying to learn. The lm386 is an audio amplifier designed for use in low voltage consumer applications. To begin with, the signal goes to the input pin 3, noninverting input. This connector will be having three connections like the ground right and left audio. Lm 386 gain is internally set to 20 without most external parts and by adding few external resistors and capacitors we can increase gain to any value from 20 to 200. Tiny audio amplifier using lm386 electronic circuit diagram circuit and wiring diagram download for automotive, car, motorcycle, truck, audio, radio, electronic devices, home and house appliances published on jun, 2016. It is a very low cost audio amplifier and can power any speaker. Lm386 datasheet, lm386 pdf, lm386 data sheet, lm386 manual, lm386 pdf, lm386, datenblatt, electronics lm386, alldatasheet, free, datasheet, datasheets, data sheet, datas sheets, databook, free datasheet.
Lm386 is a low voltage audio amplifier and frequently used in battery powered music devices like radios, guitars, toys etc. The potentiometer will work as the volume control on the speaker. The lm386 is a type of operational amplifier opamp. This is a build video of a very simple audio amplifier based on the lm386 chip. I have built a simple circuit using a circuit based on what i read in the database. Jan 23, 2020 the basic operation is to follow the audio signal to a point where it is not available or is undergoing any changes that should not occur. Braga portuguese language using test instruments measure. Only a couple resistors and capacitors are needed to make a working audio amplifier. Circuit a will give a voltage amplification of 200. This is another a circuit diagram of homemade mic speaker amplifier using lm386. This lm386 audio amplifier circuit can be used as small mic and loudspeaker system for a small space like a room.
The gain range is 20 to 200, gain is internally set to 20 without using external component but can be increased to 200 by using resistor and capacitor between pin 1 and 8, or just with a capacitor. The ic lm386 is a power amplifier used for amplifying small audio signals with low supply voltages. Here is a simple lm386 based audio amplifier circuit with the authors prototype shown below. This audio signal can be from a microphone or even from a 3. Following circuit can be used for minimized public addressing audio amplifier. Lm4862 amplifier circuit a better lm386 alternative. Nevertheless, you can use the section of lm4862 stage after the r3 volume. Simple condenser microphone circuit lm386, mic audio. The circuit of the audio amplifier consists of a transistor a device to apply the input signals and a speaker at the output. It includes the very popular lm386 audio power amplifier 8pin ic, a welldesigned pcb for the lm386, schematics, and the parts to build it.
Lm386 datasheet texas instruments, download pdf radiolocman. Diy electronic kit lm386 super mini audio amplifier diy kit suite trousse lm386 amplificador module board 3. The pcb printed circuit board is provided with the diy kit and it needs to be soldered, hence the name diy kit. If you have never made an audio amplifier, please try this. Lm386 is one of the important ic in audio field and is featured commonly for portable speakers and laptop speakers. They take an input potential voltage and produce an output. Lm380 1features description wide supply voltage range. For the cost and size of the circuit, the sound from the lm386 audio amplifier can be adequately loud. The output automatically selfcenters to onehalf the supply voltage. The ic is designed to deliver a voltage amplification of 20 without external addon parts.
Created feb 16 2014 this is a very basic integrated circuit amplifier. They can also be used in tv sound systems, line drivers, servo drivers, ultrasonic drivers, etc. Lm386 low voltage audio power amplifier datasheet rev. R2 and c4 form a zobel network, and are most definitely required to provide stability to the output. A very basic commonly used lm386 circuit is shown below. Find out how to build a great sounding audio amplifier with bass boost from the lm386 ic and learn what makes this amplifier sound better than the rest.
About circuit audio signal and rf follower for bench maintenance. Lm386 audio amplifier lm386 audio amplifier circuit in this project, we will show you how to build lm386 audio amplifier circuit. To learn how to use this tool, i suggest you download this pdf of the newton c. Dec 20, 2018 audio amplifier circuit using transistors lm386. The basic operation is to follow the audio signal to a point where it is not available or is undergoing any changes that should not occur. The lm386 is a power amplifier designed for use in low. The important factors that need to be considered while designing a audio amplifier is gain,noise, frequency response and distortion. Apr 30, 2011 this is a build video of a very simple audio amplifier based on the lm386 chip. May 04, 2017 in this project, we will show you how to build lm386 audio amplifier circuit. Many electronic projects require the use of a small audio amplifier. Pin diagram and circuit diagram of lm386 audio amplifier circuit. In order to hold system cost to a low quiescent power drain. You need to connect the audio wire to the input pin of the audio amplifier circuit.
Figure 15 lm386 internal circuit and 8pin dip pin assignments. This is a signal amplifier in the nonreturn phase form. It can be used for either driving speakers or headphones. Lm386 datasheet, lm386 pdf, lm386 data sheet, lm386 manual, lm386 pdf, lm386, datenblatt, electronics lm386, alldatasheet, free, datasheet, datasheets, data sheet. There are many other audio amp ics on the market lm380 and lm383 are. Dec 06, 2017 lm386 is one of the important ic in audio field and is featured commonly for portable speakers and laptop speakers.
This lm386 amplifier circuit has provisions for the output gain to be adjusted anywhere from 20 to 200. This little amplifier circuit can be actually used for all applications that require a small audio signal to be amplified to a reasonably high audible level. In this tutorial, ill show you how to build a great sounding audio amplifier with the lm386 low voltage audio power amplifier. The lm386 is a power amplifier designed for use in low volt. Lm386 low voltage audio power amplifier national does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and national reserves the right at any time without notice to change said circuitry and specifications. The ic is powered using the pin 6 typically 5 or 9v and the ground pin 4 is connected to the ground. Be it a radio transceiver, a digital voice recorder, or an intercom, they all call for an audio amp that is small, cheap, and has enough power to provide adequate loudness to. Lm386 low voltage audio power amplifier echelle inconnue. It is built around popular amplifier lm386 ic1, an 8ohm, onewatt speaker ls1, four capacitors and a few other components. Build a great sounding audio amplifier with bass boost. The inverting pin pin 2 is normally grounded and the noninverting pin pin 3 is provided with the audio signal. Nov 12, 2014 audio amplifier using lm386 is the artlcle explaining audio amplifier simple audio amplifier circuit that is easy to build and has few components only, first part is the input stage, here is. Share on tumblr the lm386 is a power amplifier integrated circuit designed for to use in low voltage applications. The circuit c is not for voltage amplification but will raise the bass level by about 5 db.
This circuit can also be used in many applications like portable music players, intercoms, radio amplifiers, tv sound systems, ultrasonic drivers etc. There are many audio amplifier circuits designed using lm386. The circuit works however there is a lot of noise and the sound quality quickly decreases at higher volumes however that may just be the speaker i am using. This is an electronic diy kit, some soldering experience is required. Download lm386 datasheet pdf texas instruments document. The lm386 is a mono low voltage amplifier that can be used in a variety of applications.
For a more functional setup that adds additional capability, checkout to the circuit below. Lm386 audio amplifier circuit diagram circuit digest. There are three varieties of the lm386, each with different output power. Figure 3 circuit diagram for the lm386 op amp audio. Before moving into the circuit details lets have a peek at some of the technical specs of the ic. Tiny audio amplifier using lm386 electronic circuit diagram. How to make audio amplifier using lm386 lm386 audio. Lm386 snas545c may 2004revised may 2017 lm386 low voltage audio power amplifier 1 1 features 1 battery operation minimum external parts. Wide vin low power audio amplifier with internal gain. Low voltage audio power amplifier, lm386 datasheet, lm386 circuit, lm386 data sheet. The paper proposes the development of a guitar audio amplifier that is made from a lowpriced ic lm386 chip, this amplifier can also be used for radios.
Tiny audio amplifier using lm386 electronic circuit. 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. A radio receiver circuit is one of these examples, as shown below using a tiny zn414 am receiver. The transistors are connected based on the necessity. This is one of the worlds most popular audio power amplifier integrated circuits ever made.
I built about a dozen different audio amplifier circuits with the lm386 but most of them had way too much noise, popping, and other interference. Ic lm386 is a low voltage audio power amplifier device from texas instruments, it is most suitable for audio system design and here we make prototype of lm386 audio amplifier circuit with few external components. May 28, 2018 a very basic commonly used lm386 circuit is shown below. Here lm386 acoustic audio amplifier circuit designed with gain and bass control. One such simple audio circuit is proposed here using the ic lm386, which requires very few other external passive components for functioning. Hi every body i want to design an audio amplifier circuit using lm386 and lm358. Audio amplifier using lm386 electronic projects, power. Audio amplifier circuit, working and details of nx, lm386. Circuit diagram of the lm386 based audio amplifier is shown in fig.