Yet another Volume controlers and source selections - Page 2

danzup · 12th September 2009, 08:59 AM

And some pictures with the variant with atmega8515 and alps motor potentiometer build by alex_mm :
http://i26.tinypic.com/9j39dz.jpg

danzup · 08:22 AM

"Hello Danzup,

I would like to ask a question and I hope I'm not OT cause I've been OT in the "Ebay Hdam module" thread.

Does your relay based ATT suffer from audible click in the speaker ( not the relay) ?

Cause I have a similar ATT I bought off ebay, And It has audible on the speaker click at only 2 points in its attenuation range. "

I give here the answer : no there are not such click or pop in speakers in my resistor r2r or shunt type volume .
Because everything is done properly in soft and in pcb layout of the volume controller .
Every up or down in volume attenuation is done in software by switching to max attenuation (mute ) for 2.... 6 ms (depending on the relay parameters !!! every type of relay have different time for settle ) and then applying the new value .
Ok ?

danzup · 15th September 2009, 08:19 AM

A little history about all my realizations in volume controllers :
http://translate.google.ro/translate...state0=&swap=1

marchel · 15th September 2009, 05:15 PM

Quote:

Originally Posted by danzup

"Hello Danzup,

I would like to ask a question and I hope I'm not OT cause I've been OT in the "Ebay Hdam module" thread.

Does your relay based ATT suffer from audible click in the speaker ( not the relay) ?

Cause I have a similar ATT I bought off ebay, And It has audible on the speaker click at only 2 points in its attenuation range. "

I give here the answer : no there are not such click or pop in speakers in my resistor r2r or shunt type volume .
Because everything is done properly in soft and in pcb layout of the volume controller .
Every up or down in volume attenuation is done in software by switching to max attenuation (mute ) for 2.... 6 ms (depending on the relay parameters !!! every type of relay have different time for settle ) and then applying the new value .
Ok ?

First of all, thank you , and I want to apologize if I make a stupid question.

This is the stupid question: So you mean to say that your ATT will momentarily mute in between relay transition?

danzup · 16th September 2009, 07:07 AM

Quote:

Originally Posted by marchel

First of all, thank you , and I want to apologize if I make a stupid question.

This is the stupid question: So you mean to say that your ATT will momentarily mute in between relay transition?

Yes !
This is what i have explained to you !

And if your kit purchased from e-bay is with atmel atmega I will write for you a new software if you give me the schematics .

marchel · 16th September 2009, 10:26 AM

Quote:

Originally Posted by danzup

Yes !
This is what i have explained to you !

And if your kit purchased from e-bay is with atmel atmega I will write for you a new software if you give me the schematics .

Thanks , I greatly appreciate your kindness, But I dont think my att is programable.

Thanks.

danzup · 02:21 PM

And another type of volume/selection controller made by me in 2005 .
Who want the soft just ask .
Used I2C port expander from Philips to command the relay PCF8574A .

danzup · 03:01 PM

@Pryanick
soft for Pga 2310 Pga 2311 Pga4311 with 6 inputs and with dB attenuation on LCD
(the schematics are from Project nr. 2 )

Pryanick · 18th November 2009, 03:07 PM

Thank you danzup
I'll test it today in the evening

Pryanick · 19th November 2009, 04:03 PM

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.

15th September 2009, 08:15 AM	#12
danzup diyAudio Member Join Date: Oct 2007 Location: Bucuresti	"Hello Danzup, I would like to ask a question and I hope I'm not OT cause I've been OT in the "Ebay Hdam module" thread. Does your relay based ATT suffer from audible click in the speaker ( not the relay) ? Cause I have a similar ATT I bought off ebay, And It has audible on the speaker click at only 2 points in its attenuation range. " I give here the answer : no there are not such click or pop in speakers in my resistor r2r or shunt type volume . Because everything is done properly in soft and in pcb layout of the volume controller . Every up or down in volume attenuation is done in software by switching to max attenuation (mute ) for 2.... 6 ms (depending on the relay parameters !!! every type of relay have different time for settle ) and then applying the new value . Ok ? Last edited by danzup; 15th September 2009 at 08:22 AM.

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15th September 2009, 08:19 AM	#13
danzup diyAudio Member Join Date: Oct 2007 Location: Bucuresti	A little history about all my realizations in volume controllers : http://translate.google.ro/translate...state0=&swap=1

18th November 2009, 03:07 PM	#19
Pryanick diyAudio Member Join Date: Nov 2009 Location: Minsk	Thank you danzup I'll test it today in the evening