Looking for 0-10V Analog Volume Control Circuit

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Zaaphod

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Joined 2011
#1
I am looking for an analog remote volume control which will operate by a 0 to 10V input signal, where 0V = 0% and 10V = 100% and scaled appropriately so that 5V would sound like 50% I'm thinking I would need something to emulate the effects of an audio taper potentiometer, but solid state. Anyone have any suggestions on where to start with this?

I've seen some digital volume control IC's but they typically have up and down push buttons, not an analog input which represents the volume level.

Zaaphod
 
#5
You could also use one of the Programmable Gain Amplifier chips available such as PGA2310 or CS3318 in conjunction with a microcontroller running code which controls the chip from the in-built ADC. You'll get proper log response from linear voltage input and for your desired range you can use a simple resistor divider to drop the 10V max to 5V.

Response times wouldn't usually be so fast as a VCA though, so if this is for a music compressor/limiter rather than volume control then it's not so suitable.
 
#7
Zaaphod said:
I am looking for an analog remote volume control which will operate by a 0 to 10V input signal, where 0V = 0% and 10V = 100% and scaled appropriately so that 5V would sound like 50% I'm thinking I would need something to emulate the effects of an audio taper potentiometer, but solid state. Anyone have any suggestions on where to start with this?

I've seen some digital volume control IC's but they typically have up and down push buttons, not an analog input which represents the volume level.

Zaaphod
Click to expand...

I'm just finishing up the software for a PIC-based LDR volume control. Not ready if you need it right now, but it'll be out there eventually. 2.5"x3.5" board, 52dB for 10K pot and eventually available for any pot value. Log output is controlled by 5V linear input so it would meet your requirement.

http://www.diyaudio.com/forums/analog-line-level/170381-precision-led-ldr-based-attenuator-30.html
 
#8
Dr_EM said:
You could also use one of the Programmable Gain Amplifier chips available such as PGA2310 or CS3318 in conjunction with a microcontroller running code which controls the chip from the in-built ADC. You'll get proper log response from linear voltage input and for your desired range you can use a simple resistor divider to drop the 10V max to 5V.

Response times wouldn't usually be so fast as a VCA though, so if this is for a music compressor/limiter rather than volume control then it's not so suitable.
Click to expand...

Thanks for this suggestion! The PGA2310 actually looks perfect for my application, and after looking over the datasheet for it, I think I will re-think my project to use this directly. I already have a microcontroller for this project, I was trying to use one of it's analog outputs for master volume control because it was there, and by using it I could control the volume using only one output... but the synchronous serial interface the PGA2310 uses would allow me to control the volume with only 2 pins.. clock and data.. and it would be way less complicated and much more reliable as I won't have to deal with noise affecting my any analog signals. Response time won't be an issue, this is intended to be just remote volume control, that might actually be adjusted 3 or 4 times a day at the most.
 
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