Yet another Volume controlers and source selections - Page 45 - diyAudio
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Old 15th December 2010, 06:42 PM   #441
aditya is offline aditya  India
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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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Old 20th December 2010, 08:50 AM   #442
TBKK is offline TBKK  Germany
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Hi,

I want to build the one with motordrive see #1. but the software only indicate
volume up and volume down and input selection. can it be change with the right position of the volume.
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Old 20th December 2010, 10:41 AM   #443
danzup is offline danzup  Romania
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Quote:
Originally Posted by TBKK View Post
Hi,

I want to build the one with motordrive see #1. but the software only indicate
volume up and volume down and input selection. can it be change with the right position of the volume.
No , because the potentiometer is actionable manually and microcontroller is not aware of that button position .
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Old 20th December 2010, 10:56 AM   #444
TBKK is offline TBKK  Germany
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yes, but is it not possible to count the puls to the motor? and remember this
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Old 20th December 2010, 11:13 AM   #445
danzup is offline danzup  Romania
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Quote:
Originally Posted by TBKK View Post
yes, but is it not possible to count the puls to the motor? and remember this
Only if you reset always (every time you power on the amplifier ) to 0 the potentiometer and if you know the potentiometer constant .
It is not feasible this way ...
And the motor is DC not pulse !
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Last edited by danzup; 20th December 2010 at 11:17 AM.
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Old 20th December 2010, 11:27 AM   #446
TBKK is offline TBKK  Germany
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danzup,

if i connect an encoder with a belt to the potentiometer that way it will help?
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Old 21st December 2010, 01:26 AM   #447
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Quote:
Originally Posted by TBKK View Post
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
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Old 22nd December 2010, 02:08 PM   #448
vzs is offline vzs  Europe
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Here is the bugfix for direct select input 4
Thanks! I will try it only after Xmas as there are other stuffs to do before
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Old 23rd December 2010, 02:24 PM   #449
Geosto is offline Geosto  Netherlands
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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
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Old 28th December 2010, 08:59 AM   #450
danzup is offline danzup  Romania
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Quote:
Originally Posted by Geosto View Post
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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Last edited by danzup; 28th December 2010 at 09:01 AM.
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