Tagged Questions

The LM386 is a "Low Voltage Audio Power Amplifier"

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1
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1answer
62 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
48 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 ...
1
vote
2answers
193 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
97 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
vote
3answers
575 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
vote
1answer
85 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
778 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
255 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
391 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
votes
2answers
668 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
243 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
5k 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
votes
2answers
354 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
vote
0answers
764 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
vote
1answer
731 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 ...
1
vote
2answers
2k 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
4k 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
846 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
votes
5answers
2k 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 ...