Yet another Volume controlers and source selections

hii this is my pcb layout with 3 relays and a seperate board for avr along with provision for future crystal ... just in case
 

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danzup,

if i connect an encoder with a belt to the potentiometer that way it will help?

It can be done ,
IF you connect a 10K potmeter with a belt to the potentiometer, then the potmeter to GND (ADC) +5V

The use 1 of the ADC channals to read the volt on the potmeter
and convert it

The adc channel read 0 - 1023 then convert it into a volume db table for read out on lcd

I did not say its easy but it can be done
 
Danzup hi,

First my compliments for this beautiful volume controller
I would like to build Project No 3
but I do have a few questions.
I understand that the input impedance is 20K.
What values do I need if I want to reach 100K?

I am also looking for the Microcontroller but can only find this one ATMEGA16-16PU.
Is this the right one?

Regards George
 
Danzup hi,

First my compliments for this beautiful volume controller
I would like to build Project No 3
but I do have a few questions.
I understand that the input impedance is 20K.
What values do I need if I want to reach 100K?

I am also looking for the Microcontroller but can only find this one ATMEGA16-16PU.
Is this the right one?

Regards George

Hi , for calculating the part of r2r volume look here :
Resistor-Switch Attenuator Networks for Audio Volume Control
and for some theory about how is working everything look here :
Resistor-Switch Attenuator Networks for Audio Volume Control
you can use the soft ( including Farmtech special firmware ) with ATMEGA16-16PU without modification .
Good luck !
And a Happy new year for all !!!!
 
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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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Joined 2010
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?
 
volume remote control module with PGA 2311

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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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