Audio Switch Ideas

[metal]

I have a problem in my office where I usually use headphones for my mobile and PC audio, and I have to either two headphones for phone and PC and keep removing/putting them according to which audio I need, or use one headphone and move the 3.5mm Jack from phone to PC and vice versa. I know this sounds silly, but it is really annoying when you have to switch between the PC and phone audio during 8~16 hours everyday.

I want to make an audio switch which has two inputs and one output, any brilliant ideas!? audio switch IC recommendation is most welcome.

[Sideshow Bob]

How are planning to power this thing using power from a USB port perhaps. Anyway In this situation I would perhaps have selcted the least hitech method like using a mechanical switch or a relay. As 3 pole double throw relays are quite common

[Old_but_Alive]

just use a rotary or toggle switch, 2 sockets, i plug, and a few bits of wire - simple

[xor]

you can use single cell switch using the 4016 in your situation need two and make XOR logic on command pins or, a simple R/C network can be put in place of the 20k pot to fade the audio

[Sideshow Bob]

you can use single cell switch using the 4016 in your situation need two and make XOR logic on command pins or, a simple R/C network can be put in place of the 20k pot to fade the audio

I think the 4016 has to high switch On-State Resistance to be used in a switch for headphones. I think even the 4066 may have to high switch On-State Resistance. So I am still in favor of a mechanical switch here.

[Mr. Spock]

Mosfet ?

[Signal]

There are bluetooth devices that can be paired with multiple audio sources and could be switched between on the fly by manipulating buttons on headset.
One of the first links from google search: https://www.businessinsider.com/plantronics-backbeat-500-bluetooth-headphone-review-2017-4

[enzine]

https://www.ebay.com/itm/3-5mm-Stereo-audio-Switching-Board-socket-2-IN-1-OUT-1-IN-2-OUT-CA/253225299876?hash=item3af5676fa4:g:83EAAOSwGMNbpFzs

Very simple and inexpensive

[metal]

The last one is an excellent idea! As Sideshow Bob, mechanical appears to be the best solution. I would then do sth like this:
https://www.ebay.com/itm/Nobsound-Little-Bear-Mc102-Mini-2-1-In-1-2-Out-3-5Mm-Stereo-Audio-Switch-Audio/202772854481?hash=item2f363436d1:g:VX4AAOSwC4NdckOd any idea about the resistance value of the volume control?

[Silent_Thunder]

hi
If you plan to use mechanical switch to choose between the inputs, put the volume control on the output, a 10k resistor will do, the wiper of the volume is the output, and either ends of the resisitor is the input, the other end is GND, but you have to use dual wiper volume control for stereo.

[Sideshow Bob]

Come to think about it there are infact Audio IC solutions that may fir your need well also like LM4836 it only needs a single supply max 5.5 volt. It has all you need,like input mux, DC volume control and mute And it is also in a TSSOP Package. It also look like you can score some on say ebay A mechanical switch may be quite attractive if you only want a simple switch. But as you start to ad functions like mute and volume controll. The part cost start to add up. 2 or 3 pole double throw switches and dual logarithmic potentiometers are not free. For your question about the  resistance value of the volume control. You can use that headphones for portable meadia very often have an impedance of 32 ohm @1KHz. So I guess you can start testing with a pot in the Kohm range

[metal]

The reason I need to do it myself is that the phone jack of the mobile is 4 rather than 3, this is sth I remembered today. sth like this for the phone and headphones 3.5mm plugs: https://uk.farnell.com/w/c/connectors/audio-video-connectors-adapters/audio-video-connectors/prl/results?no-of-contacts=4contacts&st=phone%20jack I think I will use a DPDT switch, LA4145 audio amplifier which I knew since I was 14yrs old, and the mic line will connect directly from the phone input jack to the output jack, no need for switching the mic.. https://uk.farnell.com/search?st=TS5A22362

[microwkid]

My vote goes to Bluetooth earphones. simple and easy

[Captain_Boblo]

It might not be exactly what you want (because you'll need a new pair of headphones) but I would also recommend bluetooth headphones.  The Bose QC3 can connect to two different sources at the same time. 
Might be an option to consider for the future. 

[towlerg]

This post is starting to sound like the old Irish joke about asking directions and being told not to start from here.

[bigtoy]

This post is starting to sound like the old Irish joke about asking directions and being told not to start from here.

LOL

[pl4tonas]

Hello Metal,
I believe that you can do the job easily.
You can use a Latching Relay with 2 DPDT (change over contacts) i.e. one for the left and one for the right channel, and 2 switches to choose the input by changing the Relay's position.  

[metal]

Windows 10 1909 https://wccftech.com/windows-10-2020-18999-call-function-to-your-phone-app/

[pickit2]

why not play the audio from the pc via the mobile then you can control the audio with the phone.

[kreutz]

Check here: https://www.maximintegrated.com/en/products/analog/analog-switches-multiplexers/audio.html

[~5]

(...)
I want to make an audio switch which has two inputs and one output, any brilliant ideas!? audio switch IC recommendation is most welcome.

I am a little confused. Is there a specific reason why you need/want to use an audio switch IC? You should be able to do what you need with a 3PDT toggle switch.

Even if you use an IC-based switch, you would still need a mechanical switch of some sort to decide which input you want to select.

[pickit2]

I am a little confused. Is there a specific reason why you need/want to use an audio switch IC? You should be able to do what you need with a 3PDT toggle switch.

Even if you use an IC-based switch, you would still need a mechanical switch of some sort to decide which input you want to select.

He is not within reach of the unit. if  he was then he could switch without adding more switches to do the switching... simples...

[~5]

He is not within reach of the unit. if  he was then he could switch without adding more switches to do the switching... simples...

I'm not less confused. lol

The unit would use a switch to control an IC that switches the signals. Why not cut the middle man and switch the signals directly? No external power supply and easy/cheap to put together.

Having said that, I entirely understand if one wants to do it as an exercise to try a different may to manage signals.

Another way to switch the signals would be with an Arduino board that controls a few set/reset relays. It would still require a power supply but one can add LEDs, buttons or an extra input without too much effort.

Or instead of the relays, one could use electronic potentiometers to gradually switch between the two signal sources. Perhaps a little bit over the top but pretty cool - especially if one adds some LEDs to show the levels.

[sadman]

this is what you are looking for idea is publish in latest Elektor lab article in January 22, English version share