I will post more projects that was made by me :
1. Volume controller / source selector for motor potentiometer ( like Alps blue velvet ) :
-schematics
-avr atmega8515 soft
-pcb
On atmega8515 you have to write only the fuse-bit named :
" Internal RC oscillator 8Mhz "
1. Volume controller / source selector for motor potentiometer ( like Alps blue velvet ) :
-schematics
-avr atmega8515 soft
-pcb
On atmega8515 you have to write only the fuse-bit named :
" Internal RC oscillator 8Mhz "
Attachments
Projetc nr.3
3. Control and audio select with relay and r2r volume
- volume with quality MELF resistors for r2r or shunt adjusting
- infrared remote control in the stop / start amplifier
- selection from 4 sources of signal relays
- version Display with LED or LCD display as it wants ( depending on board will possible planting to serve both variants )
3. Control and audio select with relay and r2r volume
- volume with quality MELF resistors for r2r or shunt adjusting
- infrared remote control in the stop / start amplifier
- selection from 4 sources of signal relays
- version Display with LED or LCD display as it wants ( depending on board will possible planting to serve both variants )
And some pictures with another type of testing different volume controler :
http://i33.tinypic.com/2q8zyhc.jpg
http://i38.tinypic.com/i78sd1.jpg
http://i29.tinypic.com/34rzlp5.jpg
http://i33.tinypic.com/2q8zyhc.jpg
http://i38.tinypic.com/i78sd1.jpg
http://i29.tinypic.com/34rzlp5.jpg
4 . This project was made by me for a friend who buy from ebay a kit like this :
http://forum.analogmetric.com/viewthread.php?tid=349&pid=421&page=1&extra=page=1
but did not work at all !
So I write the software for this kit . I post here for everyone who want to use .
Atenttion : I have remove the AT89C2051 ( look at the old schematic ) from that pcb and replace with ATTINY2313 ( look at the new slightly modified schematics) which is more modern micro controller .
http://forum.analogmetric.com/viewthread.php?tid=349&pid=421&page=1&extra=page=1
but did not work at all !
So I write the software for this kit . I post here for everyone who want to use .
Atenttion : I have remove the AT89C2051 ( look at the old schematic ) from that pcb and replace with ATTINY2313 ( look at the new slightly modified schematics) which is more modern micro controller .
Attachments
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Erratta
the correct soft for attiny2313 soft (that on precedence post do not work correct for power command)
the correct soft for attiny2313 soft (that on precedence post do not work correct for power command)
Neat. I was thinking about remote controls a bit lately, and thought something like this might integrate really easily with a "lightspeed" style attenuator using LDRs controlled by the micro controller. Seems trivial to control the brightness of an LED via the voltage on a pin.
And while you are at it, you could configure each input to "remember" it's previous volume setting.
Just some ideas I wanted to share since I will probably never build my own remote controlled preamp 🙂
jsn
And while you are at it, you could configure each input to "remember" it's previous volume setting.
Just some ideas I wanted to share since I will probably never build my own remote controlled preamp 🙂
jsn
And some pictures with the variant with atmega8515 and alps motor potentiometer build by alex_mm :
http://i26.tinypic.com/9j39dz.jpg
http://i26.tinypic.com/9j39dz.jpg
Attachments
"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 ?
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 ?
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A little history about all my realizations in volume controllers :
http://translate.google.ro/translat...35&t=29786&sl=ro&tl=en&history_state0=&swap=1
http://translate.google.ro/translat...35&t=29786&sl=ro&tl=en&history_state0=&swap=1
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 .
Thanks , I greatly appreciate your kindness, But I dont think my att is programable.
Thanks.
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 .
Who want the soft just ask .
Used I2C port expander from Philips to command the relay PCF8574A .
Attachments
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soft for Pga 2310 Pga 2311 Pga4311 with 6 inputs and encoder
@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
soft for Pga 2310 Pga 2311 Pga4311 with 6 inputs and with dB attenuation on LCD
(the schematics are from Project nr. 2 )
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