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Old 20th November 2009, 07:24 AM   #21
danzup is offline danzup  Romania
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Quote:
Originally Posted by Pryanick View Post
Hi
I tested firmware today
One question I've got: why only +10db?
Datasheet says that +31.5db max should be.
Danzup, can you fix it please?
Thank you.
I have limited to +10dB because if you do the math when you have on input a CD-player which usually have over 2V on output you will have big distortion because you overshoot the analog power voltage on PGA ( the soft I am using in one of my preamplifier I have build I use limit to 0dB !!! because +10dB tend to be to much) .
But if you want I can rewrite again the soft to reach the 31.5dB !
( Are you sure you want that ? )
---------------------------
Later edit : I have done what you asked about , here is the soft.
Attached Files
File Type: zip pga2310_1_6_d_31_5.bas.zip (2.6 KB, 411 views)
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There are not better tube than 6P3S and 6N2P for my ears !

Last edited by danzup; 20th November 2009 at 07:50 AM.
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Old 20th November 2009, 08:43 AM   #22
danzup is offline danzup  Romania
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Quote:
Originally Posted by danzup View Post
I have limited to +10dB because if you do the math when you have on input a CD-player which usually have over 2V on output you will have big distortion because you overshoot the analog power voltage on PGA ( the soft I am using in one of my preamplifier I have build I use limit to 0dB !!! because +10dB tend to be to much) .
But if you want I can rewrite again the soft to reach the 31.5dB !
( Are you sure you want that ? )
---------------------------
Later edit : I have done what you asked about , here is the soft.
Here is a proposition for pcb layout :
Attached Images
File Type: jpg pga2310_atmega8515_pcb1.jpg (337.6 KB, 3350 views)
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Old 21st November 2009, 08:04 AM   #23
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Hi
I'm going to use passive preamp.
It means signal slackening by 10...20dB. That's why I want to control full PGA2310 dynamic range.
You were right when you said about CD-player with 2v output. 3 years ago I made DAC on CS8416&CS4391A for CD-ROM and I have 1.98v output on it. But in any time I can make volume lower.

Thank you danzup for PCB layout.
I already made my PCB.

Thank you again for the soft and for your help
Attached Images
File Type: jpg IMG_6673.jpg (379.9 KB, 3233 views)
File Type: jpg IMG_6675.jpg (325.6 KB, 3028 views)
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Old 21st November 2009, 09:17 AM   #24
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Hi again
There are some errors
Danzup, could you fix it please...

Error : 49 Line : 220 Value doesn't fit into BYTE [256] , in File : D:\...\PGA2310_1_6_D_31_5.BAS
Error : 49 Line : 223 Value doesn't fit into BYTE [256] , in File : D:\...\PGA2310_1_6_D_31_5.BAS
Error : 7 Line : 0 IF THEN expected [ 223] , in File :
Error : 123 Line : 0 END IF expected , in File :
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Old 22nd November 2009, 07:06 AM   #25
danzup is offline danzup  Romania
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Quote:
Originally Posted by Pryanick View Post
Hi again
There are some errors
Danzup, could you fix it please...

Error : 49 Line : 220 Value doesn't fit into BYTE [256] , in File : D:\...\PGA2310_1_6_D_31_5.BAS
Error : 49 Line : 223 Value doesn't fit into BYTE [256] , in File : D:\...\PGA2310_1_6_D_31_5.BAS
Error : 7 Line : 0 IF THEN expected [ 223] , in File :
Error : 123 Line : 0 END IF expected , in File :
Sorry for error , here are the fixed files for firmware (including .bin ) :
Attached Files
File Type: zip pga2310_1_6_d_31_5.bas.zip (24.0 KB, 425 views)
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Old 22nd November 2009, 03:17 PM   #26
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Hi
Thank you danzup for soft - I compiled it with no error.
Perfect!

I have a favour to ask of you to add last feature to this beautiful preamp controller - balance control.
Without balance control we have perfect device. But with balance control it will be brilliant!!!
Can you add this feature please?
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Old 22nd November 2009, 05:25 PM   #27
joemana is offline joemana  United States
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Hi Danzup,

Are you selling the kit? If you do, how much?

Thanks,

Joe
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Old 22nd November 2009, 06:37 PM   #28
jleaman is offline jleaman  Belgium
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Quote:
Originally Posted by joemana View Post
Hi Danzup,

Are you selling the kit? If you do, how much?

Thanks,

Joe
kit would be sweet!
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Old 22nd November 2009, 07:28 PM   #29
danzup is offline danzup  Romania
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Quote:
Originally Posted by jleaman View Post
kit would be sweet!
As you read in this thread I have done by the years a lot of type of controller :
- volume with specialized IC like PGA 2310 , 2311 , 4311
- volume with alps potentiometer and motor (like blue velevet)
- volume with R/2R resistor attenuator (R/2R ladder )
- volume with shunt type attenuator
- volume with TDA7318 etc.

I have only kit for R/2R type volume/attenuator and for alps motor potentiometer .

For the rest I have posted schematics , pcb , firmware and I will provide support .
If in the future will be more than 10 request I will provide more kit.
It will be help if you say what kit would you like !
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There are not better tube than 6P3S and 6N2P for my ears !

Last edited by danzup; 22nd November 2009 at 07:31 PM.
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Old 22nd November 2009, 07:32 PM   #30
danzup is offline danzup  Romania
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Quote:
Originally Posted by Pryanick View Post
Hi
Thank you danzup for soft - I compiled it with no error.
Perfect!

I have a favour to ask of you to add last feature to this beautiful preamp controller - balance control.
Without balance control we have perfect device. But with balance control it will be brilliant!!!
Can you add this feature please?
In the future firmware I will add this feature .
Need some free time for now !
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There are not better tube than 6P3S and 6N2P for my ears !

Last edited by danzup; 22nd November 2009 at 07:34 PM.
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