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Old 7th January 2015, 01:35 PM   #1
Kooka is offline Kooka  Italy
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Default Digital volume control

Anybody tried this?
http://store.sure-electronics.com/aa-ab41134

Any thoughts..?
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Old 7th January 2015, 10:03 PM   #2
Kooka is offline Kooka  Italy
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None? Not an idea..?
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Old 8th January 2015, 10:13 AM   #3
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Unless someone knows what IC it uses it's hard to make any assumptions on the quality. Also, this is in the wrong forum section.
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Old 8th January 2015, 11:30 AM   #4
pguerin is offline pguerin  France
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Hi Kooka,

No information on the Users'guide, you can try to ask the customerservice or support ...

http://sure-electronics.net/download..._Ver1.0_EN.pdf

THD seems high @ 1V
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Old 8th January 2015, 11:59 AM   #5
blu_glo is offline blu_glo  England
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Default Good Digital volume control

If you are looking for a good digitally controlled volume control IC you could try kit based on TI PGA2310 - 2320. This family has vanishingly small distortion and better low level matching than you'll get with any expensive pot.... Not affiliated with this company, but heres what a quick search turned up....

Compare Prices on Pga2310 Kit- Online Shopping/Buy Low Price Pga2310 Kit at Factory Price | Aliexpress.com | Alibaba Group

If you want proper DIGITAL DOMAIN volume control, most TI DACs already have one built in or use a DSP chip....

Last edited by blu_glo; 8th January 2015 at 12:04 PM.
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Old 8th January 2015, 12:51 PM   #6
Kooka is offline Kooka  Italy
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Thanks guys, only thing on the pga2310 is you need an extra 6-0-6vac supply. And also do not understand the 3input thing...
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Old 8th January 2015, 08:43 PM   #7
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3 input - it can switch between 3 sources, hence the 3 pairs of RCA inputs.
Supply - a small toroidal transformer with dual 6v windings 15VA would suit.
A few things to watch for -
Study the PGA2310 data sheet for input/output buffer requirements, these ready made boards have no buffers.
These boards come pre-programmed to display the source (similar ones on ebay allow you to specify at time of order the source names "CD", "TV" etc to display on the LCD - not very flexible if your requirements change in the future.
It is not too difficult to build your own using PGA2310/2320 and an Arduino to control (I managed it for a first project with help from the forum).
This means you can rename the sources as your equipment changes, you can program to use an existing remote control (I use amplifier functions on my CD remote).
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Old 8th January 2015, 10:01 PM   #8
Kooka is offline Kooka  Italy
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Ah, yes, I saw only 3 RCSs instead if 6, it is also an input selector... Thanks!
And Thanks even for the other adding s in your comment.
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Old 9th January 2015, 03:55 AM   #9
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I had an older sure-digipot, and it was noisy when muted due to their pwm-led-drivers on board. All in all, not that nice.
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Old 9th January 2015, 02:28 PM   #10
Kooka is offline Kooka  Italy
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Quote:
Originally Posted by doctormord View Post
I had an older sure-digipot, and it was noisy when muted due to their pwm-led-drivers on board. All in all, not that nice.
Got it.
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