The LM386 is a "Low Voltage Audio Power Amplifier"

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3
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3answers
154 views

why do I get noise on the output of the LM386 when I connect speaker but not when I connect a resistor?

I recently made a circuit to test out LM386 audio amplifier for the first time on solderless board. I relied on the datasheet circuit shown below: First I connected a 7.5ohm resistor at the output ...
0
votes
2answers
43 views

What is a good capacitance to use for a low pass and high pass filter?

First, I am using the minimum components circuit for the LM386 I am going to use the first circuit on this page. I am going to use a potentiometer in series with the circuit to give me variable ...
0
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1answer
47 views

What kind of speaker can be used with an LM386?

I am trying to use an LM386 to drive some speakers. I have both a 4Ω 4W speaker and 8Ω 1.5W speaker. Would I have to build a different circuit for each of these and would the LM386 be able to drive ...
1
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3answers
209 views

How to decrease distortion/noise of LM386 amplifier at max gain and volume?

From my previous question, I've made LM386 amplifier and it works better than LM1458 amplifier. I've added gain and bass boost in my LM386 amplifier. How to decrease distortion/noise of LM386 ...
5
votes
2answers
615 views

What is the purpose of the 250uF capacitor in the LM386 circuit?

The basic amplification schematics shown in the LM386 datasheet shows a 250 uF capacitor in series with the output. I don't have any 250 uF, but I do have plenty of 470uF. If I understand correctly, ...
0
votes
2answers
127 views

How loud is a 0.25W speaker supposed to be?

I know this is a very broad question; I just want to know what I should be expecting from it. At the moment it's hooked up to an LM386-N3 op-amp outputting a 5V single rail square wave and it is ...
-1
votes
1answer
72 views

Need transistor power amplifying stage scheme

i'm doing audio amplifier for my bachelors degree in physics. I have to simulate it all in Multisim. And i'm all out of ideas. First i've used simple LM386 amp scheme, but it doesn't give enough ...
0
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1answer
69 views

Do I need to decouple an LM386 if it is run from a battery? [duplicate]

What I would like to do is to put an LM386 in my bass guitar so that I can plug my headphones directly into it for practice. The LM386 was my first choice because it can run off of a 9V battery and ...
-1
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1answer
104 views

Question regarding simple preamp+audio amplifier

simulate this circuit – Schematic created using CircuitLab simulate this circuit Hello,as you can see,I constructed a circuit which consists of an amplifier(first scheme) and a ...
1
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2answers
74 views

Simple LM386 Circuit RC Branch Question

Please take a moment to checkout at the LM386 circuit below. The circuit comes directly from the LM386 specifications document: My question revolves around the output branch consisting of the 0.05 ...
0
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2answers
102 views

Feedback op-amp voltage regulator help

I have made a voltage regulator: simulate this circuit – Schematic created using CircuitLab And here is the zener circuit: simulate this circuit I have already tried to charge ...
0
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1answer
205 views

LM386 noise when using 5v power supply

I'm using LM386 with my guitar and currently I power it with 9v battery but now I want to switch to 5v power supply because I don't want to use a battery. I want to use a 5v usb wall charger + ...
1
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1answer
203 views

Why does my AY-3-8910 sound so distorted?

I'm building a circuit driven by an Arduino UNO that controls a AY-3-8910 programmable sound generator. The AY has three pins ...
0
votes
3answers
466 views

Making a Distortion Pedal

I was breadboarding a pedal for my guitar using LM386. I read that as long as the gain is too large, the output signal is clipped to produce a distortion effect. So I simply tune up gain pot between ...
0
votes
1answer
168 views

Deliberately Blowing Up an LM386N-4 Power Amp

This is a somewhat unusual, although hopefully not too irresponsible, question (I also hope it falls within the remit of this site, I can't think of anywhere else online where I'd get a trustworthy ...
3
votes
1answer
662 views

LM386 and low-pass filter

First time here, so here I am with an electronic-related question. Please note that altough I have a scientific background, I'm quite new to electronics. Setup I'm trying to build a small audio amp ...
0
votes
1answer
276 views

Circuit for sound detector using LM 386

I want to build a sound detector circuit for my project. I am free to use any amplifier but not much complex circuitry. I googled and found this circuit using LM 386. Is this good enough or is there ...
0
votes
1answer
204 views

How to supply 5 to 12v amplifier LM386

I started electronics recently and I'm trying to make the most basic mp3 amplifier. First I tried to make the amp myself with reused electronic parts but I didn't succeed... Amplify speaker with 9v ...
0
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2answers
877 views

I can not receive radio waves using LM386?

I've made two different circuits to receive RF using LM386 but they doesn't work. I've changed the values of C2 and L1 to change the frequency. I've also changed the gain but nothing happens. The ...
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votes
1answer
531 views

How to wire subwoofer to 2.0 channel amplifier

How to wire the sub-woofer amp to existing 2 channel amplifier? I have dual LM386 for left and right channel and I would like to connect a sub-woofer. where should I wire the sub ? Is it in the ...
-1
votes
1answer
82 views

LM386 emitting voltage to input line

there is around +4mV that emitted by input pin (pin2) to the ground in lm386 my question is: 1. is that normal? 2. will it damage IC audio in laptop ? 3. if (number 2 is yes) then i need to put ...
1
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1answer
734 views

LM386 audio amplifier circuit does not work

I am building a low voltage audio amplifier using LM386 op-amp. I got the datasheet from the manufacturer's website and looked at the pins and their functions. ​After, I designed my own simple ...
0
votes
1answer
284 views

What frequency range is acceptable for a speaker in an audio amplifier

I am building an audio amplifier using a lm386 amplifier with a 12 volt supply driven from a headphone jack. I am looking for a speaker that will work well in this setup. Currently I am using a ...
2
votes
2answers
11k views

How to improve lm386 amplifier circuit

I am new to the world of audio amplifiers however i am quickly trying to learn. I have built a simple circuit using a circuit based on what I read in the database. The circuit works however there is ...
4
votes
3answers
705 views

How to correctly connect audio plug to LM386?

I'm working on my first circuit which includes LM386 chip and some music. Since I don't have a lot of experience with electronics I need a little help with audio plug. It's the same as that: I know ...
1
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3answers
3k views

Alternative to LM386? To drive 8 ohm speaker with 9V circuit

I am getting pretty tired of debugging the LM386 integration into my project! I'm building a drum machine, based around schmnitt trigger oscilators and a white noise generator. I'd post the complete ...
1
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1answer
108 views

[solved]Resistors used in LM386 amplifier

I have found a circuit to bass bump headphone amplifier. In the parts list most of the resistors are 1/8 W, but I have only found 1/4W resistors. Will this effect the functioning of the amplifier? ...
4
votes
2answers
2k views

Audio from Arduino Due's analog outputs using LM386

Due's DACs provide 0-3.3v (actually less) and are rated at 3mA max. As far as I know, common speaker/headphone impedances range from 8Ω to a few hundreds, so driving these from the DACs will destroy ...
8
votes
1answer
851 views

Fully understanding LM386 datasheet minimum parts example

I'd like to fully understand the circuit marked as "Minimum Parts" at page 5 in LM386's datasheet: Is there any reason for 10k resistance at the input potentiometer or is it just an arbitrary ...
5
votes
1answer
713 views

Distorted lm386 circuit output waveform

For one of my electrical engineering labs, we are required to build an lm386 circuit with a gain of 40, then measure its frequency response. I have successfully done the first part - I get a gain of ...
3
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2answers
2k views

LM386 with Gain of 40

I am trying to build one of the example circuits in the LM386 datasheet (any of the first 3) but with a gain of 40 rather than 20, 50 or 200. I understand that the gain is controlled by the impedance ...
2
votes
1answer
366 views

LM386 not passing white noise signal that was generated by a second LM386 (updated)

I am using an LM386 to generate white noise. The circuit also has a second 386 for an on-board audio amplifier. Both chips are powered by the same 9V battery. The audio amp won't pass the white ...
7
votes
6answers
11k views

LM386 audio amplifier not amplifying

This is my first attempt at making a really simple audio amplifier. The schematics are below:- First I tried connecting the circuit to a 9V battery. (Multimeter reads around 8.3 Volts, which is in ...
4
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2answers
654 views

List of LM Integrated Circuits?

Does anyone have / know of a list of all the LM integrated circuit packages available? The EE stockroom at my university recently reorganized and they cataloged several pages of part numbers without ...
1
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0answers
1k views

Electret condenser microphone, LM386 amplification… does size matter?

I've built a motorcycle intercom, of which comprises of two amp units, one for the rider, one for the pillion. Both are powered by a 9v battery each, and the option (using a jumper) to enable boost. ...
1
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1answer
2k views

Maximize performance LM386 and 4Ohm speaker

I'm designing a very simple circuit which contains a microcontroller, an LM386 and a speaker. I've previously asked a question:Help in designing a speaker driven by an LM386 and the answers helped ...
2
votes
2answers
6k views

What potentiometer should I choose?

I want to create a sound amplifier with the LM386 and I need a potentiometer. I don't have a clue what I'm doing (:P) but I've printed out the datasheet (for the LM386) and had a look at it. So I ...
6
votes
3answers
9k views

How does this LM386 circuit boost bass?

I'm just starting out in Electrical Engineering and was wondering if anyone could clarify a question about the following RC circuit regarding the LM386. My question is about the following circuit: ...
5
votes
2answers
1k views

LM386 amp circuit lag

I'm building a motorcycle intercom and am using the LM368 IC for my amp. My circuit works well (surprisingly, I'm new to this). I've got a button which I use as a push to talk switch. This works for ...
4
votes
4answers
7k views

Why is microphone + opAmp + Arduino circuit not working?

I followed the mic + op-Amp part of this schematic exactly using an Lm386 chip: https://randomskk.net/projects/lightstrip/schematic.pdf and sent the output from the op-amp into a pin on an Arduino ...
6
votes
5answers
4k views

Is this a suitable sine wave osc? how would I control the frequency?

Overview- I'm making a bank of analog sine wave oscillators and I'm interested in keeping the design compact. I've started by making a Wien Bridge oscillator. As I'm working from a single power ...