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Yet another Volume controlers and source selections
Yet another Volume controlers and source selections
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Old 5th January 2011, 12:19 PM   #451
TBKK is offline TBKK  Germany
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Join Date: Jun 2010
Danzup,

i thought there is an excel sheet where you can change the values for the R2R
i did not found the link to that. Do you have it?
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Old 5th January 2011, 04:33 PM   #452
dobrivoje is offline dobrivoje  Serbia
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Location: Smederevo, Serbia
Geosto and TBKK,
don't waste your time. If you want to change input impedance, use Danzup's schematic and values of resistors multiply by 10 if you want 100k, or by 5 if you want 50k. The relation is linear. Then use nearest standard values. If you didn't notice yet, Danzup interchanged some values of resistors, so read post #210 of this thread. There you'll find correction.
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Old 6th January 2011, 04:16 PM   #453
TBKK is offline TBKK  Germany
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Dobrivoje

this is want you mean

Value Resistors
R30 10K 100K 50K
R31 82K 820K 410K
R32 2K5 25K 12.5K
R33 47K 470K 235K
R34 5K8 58K 29K
R35 27K 270K 135K
R36 15K 150K 75K
R37 16K 160K 80K
R38 53K 530K 265K
R39 12K 120K 60K
R40 390K 3.9M 1.95M
R41 10K 100K 50K

20K 100K 50K
Impedance

correct?
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Old 7th January 2011, 10:23 AM   #454
dobrivoje is offline dobrivoje  Serbia
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Yes, simple and efficient.
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Old 7th January 2011, 10:52 AM   #455
TBKK is offline TBKK  Germany
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Dobrivoje,

maby you know what is best;
i have an amp with input impedance of >10K
what is the best I can use
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Old 7th January 2011, 03:09 PM   #456
dobrivoje is offline dobrivoje  Serbia
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TBKK,
I'm not expert, it's my hobby.
If you ask me, my personal oppinion about the best solution is R-2R relay attenuation. Don't change input impedance. Danzup is very smart, has huge experience and he exactly knows what is doing. His solution is optimal.
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Old 10th January 2011, 02:02 PM   #457
Jempie is offline Jempie  Indonesia
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volume remote control module with PGA 2311

--------------------------------------------------------------------------------

hi

I have bought by ebay a volume remote control module with PGA 2311
the problem is that the volume starts every time with the volume level of
-46dB and does not remember the volume setting. Also the lowest volume is
-96 dB and you can still hear some sound it must be zero.

a have ask the seller to change the software of setting but the don't give
any correct awnsers. Is there a way to change the HEX file i

Crystal PGA2311 Volume remote control preamplifier kit - eBay (item 200471618932 end time Jun-10-10 20:06:21 PDT)

regards,
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Old 13th January 2011, 11:18 AM   #458
tzya2 is offline tzya2  China
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Join Date: Oct 2009
Location: China
"PGA2310_M8515_6IN_ENCODER_EDIT_MENU_RC5.zip "
pga2310_atmega8515_encoder_resize.JPG
This file is used in this circuit it?

Last edited by tzya2; 13th January 2011 at 11:29 AM.
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Old 16th January 2011, 05:27 AM   #459
aleksone is offline aleksone  Romania
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Default Challenge

hello nice preamp, i have a challenge for you, how can i connect a LMS350GF08 display to an AtMega, preferable a 128 but to anything else is ok.

i guess i need a graphics controller
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Old 16th January 2011, 07:29 AM   #460
aleksone is offline aleksone  Romania
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i foregot the datasheet

2shared - download lms350gf08.pdf
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