Active Pre-Amplifier with Digital Supervision and Balanced Inputs and Outputs

Hi,

Small Pre-amplifier with complete analog stage controlled by digital Micro-controller and information on Alphanumeric Display. Soon will be mounted after completing the design of PCB´s, and assembly and final adjust on firmware of the Micro. Already tested in isolated parts during develop.
The Phono and DAC card are removable slots to easy replace by other developments on the way.

Photos:







Futher info: valente.olimpia@gmail.com

Ave_Rapina escreveu:

Hi,

Small Pre-amplifier with complete analog stage controlled by digital Micro-controller and information on Alphanumeric Display. Soon will be mounted after completing the design of PCB´s, and assembly and final adjust on firmware of the Micro. Already tested in isolated parts during develop.
The Phono and DAC card are removable slots to easy replace by other developments on the way.

Futher info: valente.olimpia@gmail.com

Caro Ave,

Apesar do post ser antigo e as informações são quase nenhuma, achei interessante pelo design das placas e das poucas features que vc apresentou.

Teria alguma informação adicional sobre esse projeto?

Obrigado.

Regivaldo Costa escreveu:

Caro Ave,

Apesar do post ser antigo e as informações são quase nenhuma, achei interessante pelo design das placas e das poucas features que vc apresentou.

Teria alguma informação adicional sobre esse projeto?

Obrigado.

Hi, Volume/Balance/Bass/Tremble/Channel Selection -> all analog controlled by a microprocessor and alphanumeric display for user info.
I reduce the number of wires on control by using a serial bus that enables multiples slaves to be controlled by one or more masters.
This simplifies the design and mounting

Final specs when fully assembled

Further info: valente.olimpia@gmail.com

Ave_Rapina escreveu:

Hi, Volume/Balance/Bass/Tremble/Channel Selection -> all analog controlled by a microprocessor and alphanumeric display for user info.
I reduce the number of wires on control by using a serial bus that enables multiples slaves to be controlled by one or more masters.
This simplifies the design and mounting

Final specs when fully assembled

Further info: valente.olimpia@gmail.com

Ok. Your project is commercial or free for DIYers?[/quote]

[/quote]

Ok. Your project is commercial or free for DIYers?[/quote]
[/quote]

For now is only a prototype. New ones are for potential buyers.

Cheers

PCB´s rolling out





Further info: valente.olimpia@gmail.com

PCB's in mounting stage:












Further info: valente.olimpia@gmail.com

Ave_Rapina escreveu:

PCB's in mounting stage:

Very nice!

The PCB was made with very good quality. Your PCB have a good design for my eyes.

I waiting  anxiously the final prototype. I think that the other friends of forum also.

Cheers,

Some of the first trials on pcb:






Further info: valente.olimpia@gmail.com

Some Initial audio trials to test the components:




Further info: valente.olimpia@gmail.com

On the initial testbead:

Quick Snippet: