Digital volume control

Hello every one I have a project I would like to try at work. We have an old radio at one bench and speakers running to every other bench. The volume is a pain to change. I thought what if I built an app that every one can change the volume individualy on our own workstations. I tried doing some reading on digital pots but I'm still lost in the sauce and am in serrious need of help.

So I need something to controll the speakers and design the app to controll the speakers from multiple computers on a network.

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ctucht16 over 6 years ago in reply to shabaz

Thank you but its not a fix I need quick its more of a project I want to try.
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ctucht16 over 6 years ago in reply to Jan Cumps

What do you recommend? I know nothing about digipots
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Jan Cumps over 6 years ago in reply to ctucht16

ctucht16 wrote:

What do you recommend?
If you want to control the volume from computers, you will need to replace the volume controls on the back of the amplifier by computer controllable potentiometers.
That's why I suggested digipots. They can be controlled by digital signals

I know nothing about digipots
Another option are motor controlled potentiometers. They are more expensive.
Do you know how to control something like that?
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ctucht16 over 6 years ago in reply to Jan Cumps

https://ncd.io/ would there be something that could work on here?
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Jan Cumps over 6 years ago in reply to ctucht16

3 of these: https://store.ncd.io/product/analog-devices-ad5254-digital-potentiometer-4-channel-256-position-i2c-mini-module/

Each can replace 4 potentiometers. The potentiometers are linear, so it will be a little bit uncomfortable for sound volume changes.
Don't take the single or dual potentiometer kits, because there are only 4 addresses you can assign to these modules and you need to cover 12v potentiometers with these 4 addresses.

They are programmable over i2c.
If may be possible to simulate a logarithmic control by doing the calculations yourself in software.

You will also need a device that can listen to all your computers and generate an i2c signal, and 5V dc, 15 mA power supply - and wire.
The good thing with i2c is that you can put all 3 kits on the same i2c bus.
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billpenner over 6 years ago in reply to ctucht16

Question. Do you want the volume controls at the amplifier or at each speaker.
If at each speaker, google "speaker volume controls" there many to choose from.
Impedance matching is probably necessary unless you are using low wattage speakers
in which case, a simple low wattage wire wound potentiometer might work.
These methods would require the Max volume to be set at the amplifier with the individual controls set at 0 Ohms
each station could then reduce the volume as needed. the value of pots would need to be selected so as to allow desired volume reduction.
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