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Questions tagged [stereo]

Reproduction of an audio (stereophonics) or a video (stereoscopics) signals, through two separate channels.

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Interference on car bluetooth system

I just did some work on my car audio system and am having some problems with interference. I added a bluetooth receiver and wired it directly to my stereo cd player input. The receiver is powered from ...
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39 views

DIY Aux In connection to car stereo JVC KD-G151

I would like to connect my phone via jack cable (aux in) to my car stereo, which has no aux input (brand: JVC KD-G151). It is a CD player, so i wrote a silent disk to operate the cd player, and tried ...
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2answers
64 views

Mono to Stereo Pan Knob

I am trying to make a small box to take the mono audio output form my analog synth and run it through a panning knob so I can control where in the stereo mix the mono signal is placed. The goal is to ...
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3answers
95 views

Vacuum tube stereo amplifiers with an odd number of tubes

While researching the world of vacuum tube audio amps, I noticed that many commercially available stereo amps have an odd number of tubes. Here's a random example. How can a decoupled stereo sound be ...
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3answers
73 views

Does somebody have a schematic for a stereo electret condenser microphone?

I’m trying to use a Cmoy headphone amp (built around an OPA2227P chip) as a hard-wired in-ear-monitor. I bought a stereo electret condenser microphone from Jaycar this afternoon, but I can’t get any ...
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2answers
183 views

Stereo or bridged mono? (LA4597)

I have a stereo amp (LA4597) and is currently wired in a standard stereo circuit. Recently, I read an updated answer from one of my questions stating that wiring the amp in bridged mode doubles the ...
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1answer
87 views

Connect common ground stereo to a device with different ground for each channel

I have an old stereo that I want to resurrect and add Bluetooth to it. For that, I bought a Bluetooth module, this one: https://www.aliexpress.com/item/PAM8403-Wireless-Stereo-Audio-Receiver-Module-...
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2answers
291 views

How best to split a stereo audio source (LR) to two stereo amps (LL+RR)?

Suppose one has a stereo audio source with a single 3.5mm stereo output jack, and one wants to split the left and right channels so that each is produced on one of two powered (i.e. self-amplified) ...
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1answer
87 views

Crossover for vintage 16ohm horn paired with 4ohm woofer

I'm in the process modernizing a 1960s Magnavox Astrosonic stereo console. I'm wanting to keep the speakers as they look to be in great shape. It's got two 12 inch woofers (581206-1) that test (via DC ...
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1answer
93 views

Connecting Electret Mic to MT8870 Decoder Module

I'd like to connect the audio output of an Electret Microphone to the audio input of an MT8870 decoder module, which uses a 3.5mm stereo cable. I plan to power the mic at GND and VCC pins and connect ...
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2answers
184 views

piezo stereo preamp

I have found several projects on piezo preamps but I cant find anything that can run 2 piezo inputs to make it stereo and uses potentiometer to control volume gain etc. What I found is "Collin’s Lab: ...
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2answers
1k views

Stereo amplifier to single speaker [closed]

Okay so I'm new to all of this and I only have some basic knowledge. My problem is that I have an Amplifier board TDA7492P that outputs 2x25W with a minimum of 4ohm impedance. But I only have one ...
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1answer
102 views

Splitting Audio Out - are there any issues I am not seeing?

first post, so I hope this isn't TOO stupid a question. I am planning on building this circuit: https://github.com/trash80/Ym2149Synth/blob/master/Ym2149SynthSchematic-V29082016.pdf which eventually ...
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0answers
61 views

Antenna cable pin-out identification

I am trying to connect a stock car FM/AM antenna with a new aftermarket stereo system, Turns out my car antenna has 2 wires. One is Co-axial cable for signal (Most probably) and there's one more ...
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235 views

TRRS 3.5 mm Audio Plug (male) into a printed circuit board

Have a device I'd like to plug into a headphone jack of a cell phone. Wanted to start making some more professional prototypes; print my first circuit boards, etc. I'd like to be able to implement a ...
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2answers
2k views

What is the left, right, and ground of this male stereo jack?

I have a male stereo jack that I took apart from my old dead ear buds and I decided that I want to build a new set of earbuds with the stereo jack. Problem is I don't know what parts are the left, ...
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1answer
72 views

Problem with a Butterworth filter in stereo to mono audio input

Stereo to mono is simple to apply to a signal that came from audio jack. But I've encountered problems with the Butterworth filter. There is an example circuit what I've done, first, the two channel ...
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0answers
407 views

Audio input: stereo to mono and filtering DC

I have to get an audio input from a PCB 3.5mm jack and summing right and left channel into one (mono). Then, I have to filter any DC noise from the input. Resistors are 1kOhm each. This, for now, ...
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0answers
182 views

Why are only 3 pins connected on a dual gang pot? [closed]

First post on this platform... I am wondering if anyone knows why in some DJ Mixers (e.g. Pioneer) which use dual gang pots for channel faders, only 3 of the 6 available pins are connected. Also, ...
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0answers
48 views

Mono output to stereo input [duplicate]

Recently I've been into the idea of hooking up a Bluetooth receiver to my car stereo via my car radio's aux input. I got a Bluetooth receiver module from an old Bluetooth speaker that I had laying ...
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3answers
4k views

Accidentally downmixed stereo to mono, why does this work?

I have a cheap Chinese Bluetooth audio amplifier like this: It has four screw terminals for the speaker connections, namely L+, L-, R+ and R-. I accidentally connected a single speaker to L+ and R-, ...
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1answer
310 views

What's the best way to mute summed stereo channels?

I am building an audio mixer, and most of the instruments produce mono signals (internally split to L/R), but want to make sure it is flexible enough to use true stereo devices, and sum to mono in my ...
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1answer
806 views

Summing stereo to mono without high frequency distortion [duplicate]

just wondering how to sum stereo to mono signal? I am aware that you can use resistors in series to the left and right outputs of say a Bluetooth receiver module but when i do this, the channel does ...
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1answer
414 views

Metal enclosure for custom car stereo project

I'm thinking about developing a custom car stereo, and it surprised me that there's no DIY enclosures for this purpose. I've just found plastic boxes in the 1 DIN size which can be installed into an ...
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1answer
207 views

Can I “duplicate” a stereo signal to 5 channels? Are there any impedance issues?

A friend of mine has an old 5.1 audio system. The amplifier of the system has 5 cables as inputs to be connected to the audio source. My friend actually uses some cable splitters to send the stereo ...
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1answer
141 views

What type of 2x15 pcb connector is this (from radio)

Sorry, I know this is a tedious question (and I apologize for the poor picture quality in advance), but I'm trying to find a male and female connector identical to the follow: Male and Female PCB ...
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2answers
434 views

Can I use a Class D amplifier as a summing amplifier?

Context: I'm creating a mono, battery powered speaker. I'd like to sum the left and right channels of a stereo input signal into a mono output signal, which I feed into a Class-D Mono Audio Amplifier ...
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2answers
102 views

Can I power my circuit from the car stereo power wires?

I have a circuit that should be turned on whenever the car stereo is turned on. It will draw ~300mA. My plan is to connect my circuit to the wire harness behind the stereo as it has +12v, ground and ...
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2answers
2k views

Amplifier with bass, treble and volume contol

I'm trying to make a an 10 watt stereo amplifier with bass, treble and volume control. I found the schematic of a 10 watt amplifier ( first image ) and a schematic for for the bass, treble and volume ...
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1answer
4k views

How to connect this 5 pin audio jack?

I have this 5 pin 3.5mm Stereo Jack Socket, and I don't know what pin is the left, right and the ground. Can anyone make arrows on this picture showing every pin label?? Sorry just a newbie :/
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1answer
5k views

Mono jack output to stereo headphones : how to send the mono signal to both sides?

I have a 3.5mm jack mono output. I'm plugging standard stereo headphones into this jack, and it plays only on one side. I want the sound to come out on both sides in the headphones (same signal, but ...
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1answer
72 views

how to turn of stereo when buzzer is activated

I have a GPS geo-fence warning system that activates a buzzer alarm when the vehicle enters a area it should not. The problem is if you are playing the stereo loud we can not hear the buzzer so what ...
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1answer
73 views

no output on stereo [closed]

My stereo sometimes taking a break from playing on left channel. If I turn it off for a second and turn back on again it will play for less then a second and then will stop playing on left channel ...
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3answers
3k views

Car stereo wired to computer power supply with backup battery to keep memory

This past Christmas I re-purposed an old Car Stereo and built a portable outdoor radio for my Dad. Ultimately what I wanted to do is have it to where it runs primarily off of a computer power supply (...
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2answers
875 views

Aux cable option to car stereo [closed]

I have this old car stereo and would like to add aux cable option to this player. Is it possible?
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1answer
357 views

TPA6111 Stereo power amplifier to mono setup

I have a TPA6111 stereo audio power amplifier part (http://www.ti.com/lit/ds/symlink/tpa6111a2.pdf) that has this typical application (from the datasheet): My application requires a mono signal ...
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2answers
10k views

How to wire a stereo 3.5mm jack to a mono output [closed]

I have purchased a 3.5mm port online. I want to wire them to a mono output to a amplifier board. I have worked the ground and right and left channel terminals on the port. I am not sure how you would ...
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2answers
101 views

Data received when earpiece connected to audio jack? [duplicate]

I'm still new to electronics and signals. I'm currently doing a project, and i have to detect the type of earpiece connected to an audio jack. So far, i found out that when you plug in your earphone/...
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1answer
845 views

Replacing a VFD (vacuum fluorescent display) with an LED

I am wondering if anyone out there has tried replacing a VFD display with a modern LED or OLED display. I would like to hack my factory car stereo (Clarion) which uses a VFD with an Arduino and an ...
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1answer
873 views

Stereo-Mono circuit after passive bandpass filter [closed]

If i put a passive RC band pass (high pass + low pass) filter before the amplifer and right next to it I sum the channels with 1-5 k ohm resistors, then the amplifier is turned on,is there a ...
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2answers
2k views

Detect 3.5mm stereo jack plugged in

First off i'm using arduino as MCU. I have two internal speakers inside a box to output the sound from a FM Rádio Module, but i have also an stereo jack in my box, so anyone can plug a external ...
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1answer
131 views

DIY HiFi System components [closed]

I'd like to create small HiFi home system with few requirements: It should use ONLY HDD of up to 100 GB (No CDs, Radio or other crap!) With remote control With small screen/monitor for easy visual ...
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2answers
1k views

Hi-Fi Stereo Amplifier gain regulation with potentiometer

This is my first question ever so please don't kill me :) I have built a stereo hi-fi (end) amplifier 2x10W based on a IC TDA2009. I have bought it as a construction (learning) kit ready to solder. ...
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1answer
308 views

what is the function of pre-emphasizer and dee-emphasizer in Stereophonic FM Receiver?

what is the purpose of theses two block ? I know that pre-emphasizer will boost the high frequencies before transmission and dee-emphasizer will reducing them by a corresponding amount in the ...
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1answer
9k views

Adding Bass and Treble control to existing schematic

I have a little project in mind that I want to try. This picture below is a stereo amplifier circuit. For more info about it, you can see this page. Stereo Amp The circuit above only has Gain and ...
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2answers
1k views

How can I synchronize the framerate of two webcameras. Is it even possible?

Pretext I am currently playing with stereo vision (two cameras capturing images simultaneously) for my robot hobby project. There are a few traits that is important when processing the images ...
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2answers
5k views

How do I wire a phone/AUX input into a car stereo?

My car came with a Blaupunkt 520 as the factory fit head unit. As it uses the on-steering-wheel controls, I don't really want to swap it out, but I do want to add the ability to plug a device into it ...
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1answer
632 views

Protocol and design resource of 3.5mm stereo jack remote control

I've seen a few audio visual equipments that can be controlled with both wired (3.5mm stereo jack) and wireless (infrared). On the equipments, there are IR receiver port and also a port that resemble ...
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1answer
2k views

Stereo heaphone doesn't work properly when the balance is centered [closed]

I have an old headphone (Philips SHP1900) and it used to work fine, until the day which I accidentally stepped on it... Since then, when I listen to music, the instruments sound really loud and the ...
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1answer
173 views

Converting analog stereo to digital stereo

Analog stereo has two channels. One for every speaker. Now, when can sample and convert the two streams of data from analog to digital. But the problem, is what we will have is two streams of digital ...