Low voltage audio amplifier lm386 circuit

The LM is a low voltage audio power amplifier, simple and easy to build a mini amplifier with only a few components. The integrated chip LM is a low power audio frequency amplifier requiring a low level power supply most often batteries. It comes in an 8-pin mini-DIP. Search DIY electronic projects and circuit diagrams with descriptions. Learn electronics.

===

We are searching data for your request:

Wait the end of the search in all databases.
Upon completion, a link will appear to access the found materials.

Content:

• Low Voltage Audio Power Amplifier
• LM386 Low Voltage Audio Amplifier IC
• LM386 - Low Voltage Audio Power Amplifier
• Low Voltage Mono Audio Amplifier Board NJM386D LM386 - Ideal for Battery Operation
• IC LM386 Audio Amplifier Pin Configuration and Its Working
• LM386 audio amp-based feedback box
• Simplest LM386 Audio Amplifier in Proteus
• LM386, LM380 & LM384 Power Amplifiers
• Audio Amplifiers

WATCH RELATED VIDEO: Mini Audio Amplifier using LM386 (Tutorial:84 in हिंदी)

Low Voltage Audio Power Amplifier

Simple Mic audio amplifier can amplify sound that is given from Microphone. This circuit can also be used in many applications like portable music players, intercoms, radio amplifiers, TV sound systems, Ultrasonic drivers etc.

It can also be used as sound sensor for microcontrollers. It is inexpensive, low power operated and only need few components to work. This circuit is based on LM IC to amplify sound.

LM is a low voltage audio amplifier and frequently used in battery powered music devices like radios, guitars, toys etc.

The gain range is 20 to , gain is internally set to 20 without using external component but can be increased to by using resistor and capacitor between PIN 1 and 8, or just with a capacitor. Voltage gain simply means that Voltage out is times the Voltage IN. LM has a wide supply voltage range v. Below is the Pin diagram of LM Pin description of LM is given in the following sections along with the functions of external components used for amplification.

So let's start building our simple LM based audio amplifier circuit design. We have used 10uF capacitor C1 to get the highest gain i. Gain can be adjusted to any value between 20 to by using proper capacitor. Pin 2 and 3: These are the input PINs for sound signals. Pin 2 is the negative input terminal, connected to the ground. Pin 3 is the positive input terminal, in which sound signal is fed to be amplified.

In our circuit it is connected to the positive terminal of the condenser mic with a k potentiometer RV1. Potentiometer acts as volume control knob. A capacitor C5 of 0. The circuit can be powered with voltage between v. Pin 5: This is the output PIN, from which we get the amplified sound signal. So to remove this DC component, a capacitor C2 of uF has been used. This has the same function as Capacitor C5 0. Along with this capacitor, a filter circuit of Capacitor C3.

Pin 7: This is the bypass terminal. It can be left open or can be grounded using a capacitor for stability. Resistor R2 10k has been used as a Pull up resistor to connect Condenser mic to the positive supply voltage, to provide the power to the mic. A suitable resistor should be used for proper working of mic, you can look up to datasheet for the value or use a variable resistor and set the proper value.

This LM audio amplifier circuit can be also used to record any sound. We just need a 3. Why from your diagram.. I count there are 3 ceramic capacitors and 3 electrolyte capacitors..?

But from what you mentioned in the list, there are 5 capacitors used.. Is it you listed it wrong????? Please help me!!! Nothing is wrong, we have just used two 0. If you have 0. Go with circuit diagram. What type of potentiometer that you use? Its a normal k potentiometer variable resistor. No, you should use Signal generator and generate square wave for simulate a clap sound in Proteus.

It is just a representation of mic in circuit diagram, which looks like a Buzzer. R1 is 10k, means 10 thousands ohms. Of course, you should follow circuit diagram. Project Image is also following the Circuit diagram. I want to know the detail working of this circuit for my mini project. I a help of any one immediately. What is the output current.

Of your circuit from the speaker. It would be about mA, check LM datasheet for more info. Can you make it too loud. You can use two 0. In your circuit R1 is marked 10k, 10, ohms. As Ger said above, R1 should be 10 ohms.

Check the LM data sheet for confirmation. Can i use 47kohm potentiometer in place of k If no what are its effects. Yes, in fact the speaker used is 8 ohm 0. Dear Sir, I would like to use the amplifier for hearing aid. In this case the loudspeaker must be replaced by a crystal earphone, what changes must I make in the circuit? Kind regards. LM has gain range upto only. What do i do? I have changed my resistors to pull-up and tried everything.

Pls what is wrong. Although signal generator is generally used as replacement for Mic in proteus but there are some custom Libraries for Mic, just search them. Do I afix a audio 3. Check this one to take input from 3. Is there any programming for arduino in this project. Am doing a project on loadshedding time management using programmable interface.

I need help on the connection. Can you send circuit backside image For wiring plz. Can I have the detail calcification for the design of the circuit? Hello, I am using this circuit for an electronic stethoscope. I have inserted the condenser mic inside the acoustic stethoscope's chest-piece.

Instead of a speaker, there is an audio jack to which any earphones can be plugged in. After rigging it up and while testing there is a constant hissing noise in the background.

Adjusting the potentiometer only agravates the noise! What should I do? If we increased the sound noise is added. How can I solve it? My circuit completely destorts the speaker? Can you please provide the formulas to calculate your gain in dB and also to calculate your signal distortion for this circuit? If the pot value is maximum what is output frequency range? What is the Power rating Output??? Get Our Weekly Newsletter! Helena St. Related Content. Simple Microphone to Speaker Amplifier Circuit.

Audio Voice-over circuit using LM Arduino Based Guitar Tuner. Log in or register to post Comment.

LM386 Low Voltage Audio Amplifier IC

I will show some quite common, easy to make and generally low cost. Most of these amplifiers are used by televisions, test and measurement equipment, old modems, etc. Then someone may think that a watt amplifier per channel is low power when in fact it is not because here we talk about real power or RMS. You should know that PMPO is not a real electronic measure. First I will present the popular LM, widely used in televisions, communication radios, measuring equipment, modem, etc. This integrated circuit is very flexible for the voltage, according to the manufacturer works well from 10 to 22 volts, delivering a power of up to 2.

LM386 - Low Voltage Audio Power Amplifier

All the versions are available in dual in-line package DIP , which is useful for hobby amplifier projects; however, the LMM-1 version is available in SO package, and the LMMM-1 version is available in mini small outline package. The main advantage of this IC is its bass boost function with the addition of only two external components. If you are constructing this circuit on breadboard, then it is better to keep all the wires short, otherwise, increasing the gain to can introduce feedback noise. Alternatively, it is much cheaper to buy a readymade module online for 99p and it works far better due to short tracks and SMD components. These pins are part of the feedback loop, and internally there is a 1. By connecting an external resistor and capacitor in series across these pins, any gain between 20 and is set. A lesser-known fact about this chip is that it has frequency shaping capability. This mode is enabled using a single component and provides a nice bass sound.

Low Voltage Mono Audio Amplifier Board NJM386D LM386 - Ideal for Battery Operation

This blog uses LM integrated block as the core device to make a simple sound amplifier. Its production cost is relatively low. This blog is suitable for beginners to learn about power tubes, integrated operational amplifiers, speakers, language chips and other components. So we can master the principles, characteristics and usage of the basic amplifier circuit and power amplifier circuit.

IC LM386 Audio Amplifier Pin Configuration and Its Working

I built about a dozen different audio amplifier circuits with the LM but most of them had way too much noise, popping, and other interference. I added a bunch of extra capacitors to reduce the noise, and I added a bass boost control as well to make it sound even better. But before we start building, it might be helpful to get a little background information first…. Only a couple resistors and capacitors are needed to make a working audio amplifier. 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.

LM386 audio amp-based feedback box

We use Cookies to give you best experience on our website. By using our website and services, you expressly agree to the placement of our performance, functionality and advertising cookies. Please see our Privacy Policy for more information. GAIN 2. Semiconductor The LM is a power amplifier ,.

Simplest LM386 Audio Amplifier in Proteus

Verified Supplier. Have a requirement? Get Best Price. The LM is power amplifier designed for use in low voltage consumer applications.

LM386, LM380 & LM384 Power Amplifiers

RELATED VIDEO: LM386 Low Voltage Audio Power Amplifier

The projects are endless for this low voltage mono audio amplifier board. Make your own amplified mini speaker powered by 5 VDC. Use the USB port on your computer to make your own computer speaker. Use two boards to create amplified stereo speakers with separate volume controls for each channel. These are all plug in options that you can use with USB power, or an old cellphone power adapter laying around the house. Now let's talk about battery operated projects.

Audio Amplifiers

The LM is a versatile chip that can easily be used in many kinds of circuits. The IC runs no low voltage, therefore it is a very common yet power operational amplifier that is used even in DIY guitar pre-amplifiers. If we look at the basic definition of LM then we find:. The power intake and efficiency depends totally upon the models of the LM Basically, there are three models of aLM IC as mentioned below:. Being an op-amp, the LM has a very basic task.

The LM is power amplifier designed for use in low voltage consumer applications. 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 The inputs are ground referenced while the output automatically biases to one-half the supply voltage. The quiescent power drain is only 24 mW when operating from a 6-V supply, making the LM ideal for battery operation.