The LM386 is a "Low Voltage Audio Power Amplifier"

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2answers
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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 ...
-4
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1answer
123 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
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1answer
46 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 ...
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1answer
207 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
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1answer
81 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
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2answers
2k 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
186 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 ...
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3answers
1k 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 ...
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1answer
91 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
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2answers
1k 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
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1answer
378 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
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1answer
480 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 ...
2
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2answers
874 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
266 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 ...
6
votes
5answers
6k 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 ...
3
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2answers
424 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
884 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
853 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
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2answers
3k 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 ...
5
votes
3answers
5k 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 op amp. My question is about the following ...
4
votes
2answers
980 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
5k 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 ...
5
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5answers
3k 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 ...