New input/output Selector

[Russ White]

Ok, so Brian and I have been talking about a source and amp selector for quite a while. Finally it is coming to into existance... even if slowly.

The layout is nearly complete, but still has some tweaking. I know many of you guys have been asking me about this for quite a while, and I though it was about time to show some work.

Here are some details:

1) 3 stereo sources.
2) A selectable output buffer.
3) 2 outputs which can operate independantly or together, but from the same input source.
4) PIC MCU controlled with headers which allow for various input devices (switches, Qprox..., etc...)
5) On board PS for easy layout and integration with other projects.

The idea is for this to a be a companion to the Kookaburra preamp and Mauro's "My Ref" amp.

Keep in mind this is a work in progress... Stay tuned!!


Well here it is:

 

[Nisbeth]

You should consider moving the in/out pinheaders closer to the relays so that the "ground"-pin has a better connection to the ground plane


/U.


EDIT: Nice job, again, of course

 

[Russ White]

Thx Nisbeth,

Here is a new PIC which is a lot easier to read, and has your change.

 

[Nisbeth]

Much better


/U.

 

[Russ White]

Hmmm one trafo.. or two... Your choice!

I added one more change,

I added JAC1, JAC2, and JGND which are simple 0R resistor jumpers which allow you to use one trafo or two for semi-isolated or fully isolated PSs.

Though I am pretty sure JGND should always be in place.

 

[Evilsizer]

looks good! btw what is the size of the board so far?

 

[Russ White]

Thanks!

Well, its about 4.2" x 3.2" and it won't get any bigger, it may get a little smaller.

Cheers!
Russ

 

[Ed LaFontaine]

Hi Russ,
Will there be an option to use off-board PS?

 

[Russ White]

It would be easy enough to do with the PCB, but honestly probably no big gain there.

You would simply omit PS parts up to the REGs and wire your PS to the REG GND and OUT pads.

 

[Russ White]

Actually I meant including the regs. You would omit them as well.

 

[paulb]

You've announced quite a few new boards lately. Are you planning to sell any of them via your site?

 

[Russ White]

You've announced quite a few new boards lately. Are you planning to sell any of them via your site?

Yes,

Absolutely...

Right now Mauro's design the monobloc REV C PCBs are in stock,

And I am just waiting for my shipment of PCBs for the kookaburra.

This PCB is up next.

All of the above will/do have kits as well.

You should be able to order Kookaburra very very soon as a matter of fact.

Cheers!
Russ

 

[jleaman]

What about a remote or a lcd ?

 

[Russ White]

What about a remote or a lcd ?

The interface inputs are TTL for either manual buttons or such or another PCB which could hold an IR/RF reciever and and another PIC to control the selector.

The idea is to create a duaghter add-on PCB which can control this PCB as well as the Kookaburra at the same time, both manually, and by remote.

The board as supplied will work out of the box with manual switches, etc... but it would be very easy to fashon a remote PCB, and simply use the interface header.

I am also working on a 5.1/7.1 pre which will have LCD display + and very likely, remote functionality, built in, but that is simply because its operation is much more complex.

Cheers!
Russ

 

[Evilsizer]

The interface inputs are TTL for either manual buttons or such or another PCB which could hold an IR/RF reciever and and another PIC to control the selector.

The idea is to create a duaghter add-on PCB which can control this PCB as well as the Kookaburra at the same time, both manually, and by remote.

The board as supplied will work out of the box with manual switches, etc... but it would be very easy to fashon a remote PCB, and simply use the interface header.

I am also working on a 5.1/7.1 pre which will have LCD display + and very likely, remote functionality, built in, but that is simply because its operation is much more complex.

Cheers!
Russ

any chances it can be configured to also be a 2.1 pre as well? i know i would take a afew of these!!

 

[Russ White]

any chances it can be configured to also be a 2.1 pre as well? i know i would take a afew of these!!

Well, the 5.1 circuit I am working on would be way overkill for 2.1, but maybe you could be more specific about what you want.

What I think you are asking for is a 2 channel in preamp with a high pass filter on the two channels out plus a summing low pass filter for a subwoofer.

I started designing a PCB like that a while back. If there is enough interest I will bring it forward.

Cheers!
Russ

 

[MunkeeVegetable]

...a 2 channel in preamp with a high pass filter on the two channels out plus a summing low pass filter for a subwoofer.

I started designing a PCB like that a while back. If there is enough interest I will bring it forward.

Yes! Sounds like a great idea to me. (I'm assuming the normal stereo boards only do the two channels without subwoofers or whatever?)
--Nathan

 

[Evilsizer]

Well, the 5.1 circuit I am working on would be way overkill for 2.1, but maybe you could be more specific about what you want.

What I think you are asking for is a 2 channel in preamp with a high pass filter on the two channels out plus a summing low pass filter for a subwoofer.

I started designing a PCB like that a while back. If there is enough interest I will bring it forward.

Cheers!
Russ

i was thinking 2 channel full range then with a LFE out (150hz) down somthing along those lines... i was asking though if the 5.1 you are working on could be configured to do 2.1... would make it easier on your part... was mainly a thought...

 

[Nisbeth]

Well, the 5.1 circuit I am working on would be way overkill for 2.1, but maybe you could be more specific about what you want.

What I think you are asking for is a 2 channel in preamp with a high pass filter on the two channels out plus a summing low pass filter for a subwoofer.

I started designing a PCB like that a while back. If there is enough interest I will bring it forward.

Cheers!
Russ

I'd like to see this as well. Perhaps it could be a modular design where you can simply use more boards depending on if you want 2/5/7 channels

/U.

 

[Nordic]

am also working on a 5.1/7.1 pre which will have LCD display + and very likely, remote functionality, built in, but that is simply because its operation is much more complex.

Come on!!!!!!! You'd be my hero!!!!!!!!