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Old 9th July 2004, 03:09 PM   #11
xcel is offline xcel  Netherlands
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Quote:
Can you share your design (like schematic) and post few photos?
Well, Thomas, let me think about that...You see, at one time I did have some commercial plans with this design. I have several designs for this particular function, so maybe I can give you one of the least commercial versions

I can however show you some pictures, so hang around and give me time to retrieve them.

Xcel
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Old 9th July 2004, 03:25 PM   #12
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don´t you think this is even more simple than flip flops and counters?

Click the image to open in full size.

the code is free for download for those who do not like to code their own.
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Old 9th July 2004, 10:41 PM   #13
xcel is offline xcel  Netherlands
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Well Till,

It certainly is an elegant solution. The only drawback I see is that the impedance varies with volume settings, which can be a problem for certain circuits.

However, there a many ways that lead to Rome, as the Romans said....



Xcel

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Old 9th July 2004, 10:51 PM   #14
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I use it with Nelsons balanced Line Stage, were i don´t expect it to be a problem. Also in case someone needs it constant impedance, the same controller should be usable with relays wired differently on the signal side. For everyone who is interested and has acess to a Pic pogrammer or is able to build his own (very simple, about 5€ parts) the code is free for download.

For those who are interested and are not able to programm their own Pic, i send it preprogrammed by letter.
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Old 13th July 2004, 04:01 PM   #15
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Regarding the balanced volume control, regardless of 6-bit or 8-bit, I did saw a few diyers mentioned using the constant impedance design. Are there any published one for diy available now? (Anyone seen in other thread?)

I searched, but did not find one (some mentioned it, but no design shown!)

Thomas
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Old 15th July 2004, 01:48 PM   #16
LBHajdu is offline LBHajdu  United States
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xcel,
I would just like to see your circuit from the encoder to the 6bit digital output. I don’t think that that’s a secret. I can come up with my own spin for the relays and resistors.
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Old 15th July 2004, 06:30 PM   #17
xcel is offline xcel  Netherlands
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Here are some pictures of the 8 bit version. Unfortunately for you, I can't show any schematics since I only have paper versions at the moment. The electronic versions are on my other PC, but maybe I can convert them into a picture, let me see what I can do for you.



Xcel
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Old 15th July 2004, 08:34 PM   #18
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Here are some pictures of the 8 bit version.
Xcel,

They sure looks very nice! Look forward to see your design soon..

Thomas
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Old 15th July 2004, 08:37 PM   #19
xcel is offline xcel  Netherlands
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Thanks,

Glad you like it ! I'm quite optimistic about retrieving my "old" schematics, so hang on in there



Xcel
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Old 16th July 2004, 06:07 AM   #20
LBHajdu is offline LBHajdu  United States
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xcel,
Does this type of volume attenuator make any noise while switching?
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