Preamplifier Stereo on PGA2311

[kulamario]

Hello
As I finished the next preamplifier I wanted to share the project on the forum
The PGA2311 device is a high-performance, stereo
audio volume control designed for professional and
high-end consumer audio systems. The PGA2311
uses an internal high-performance operational
amplifier to yield low noise and distortion.

Device functions:

- Volume adjustment -95.5dB to + 31.5dB with a step of 0.5dB

- Volume control with remote control and encoder

- Balance adjustment (remote control and encoder control)

- Mute function (remote control)

-ON / OFF (remote control and switch control)

- Memorizing settings after switching off

- Real time clock + date based on PCF8583

-Cooperation with popular 2x16 displays with HD44780 driver.

- RC5 pilot (each Philips)

- Input select (5 sources)

The program was written in Bascom, it takes 51% of the memory
Fuse bits set on internal 8Mhz dnt forgot turnoff JTAG

ps.
I am asking for opinions what you think about such a device


YouTube

 

[Chris Daly]

Mine is gathering dust, as its audio delivery is very poor in comparison to what I use.

 

[kulamario]

so what u use?
if i can ask?

 

[spaceistheplace]

Mine is gathering dust, as its audio delivery is very poor in comparison to what I use.

Way to step on a guys hard work and offer no useful criticism just to plug your own kit. Come on now... is your intention to disgrace yourself?

OP:

Kudos to you. I haven’t used PGA2311 chips, but it looks like you’ve put a lot of work into it.

What’s the precision on the volume tracking?

Do you have gain or a buffer?

It has appeal to me as sort of a cost effective /minimalist amb a10 without too much in the way of sacrifice.

I’ve seen some similar implementations, one was a group buy I think here a while back.

I’m assuming you used that to inform your design? If so where do you attempt to optimize? What were your goals?

Could you post some performance measurements?

 

[kulamario]

I am happy with the work effect

 

[wintermute]

OT posts removed. please stick to discussion of the OP's project.

 

[Tromperie]

Bump.
This thread lacked visibility after intrusions and I hope this might give it notice to those interested in such.

 

[spaceistheplace]

Will the code work with an OLED display?

Also if you could post the zip contents separately, it would be helpful for us who use phones / tablets and can’t unpack the zip.

 

[maxw]

Nice. I like the white solder mask

 

[kulamario]

i have 4 PCB for sell if anybody interest please write me on prv