New input/output Selector

Russ White · 23rd October 2005, 04:30 PM

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 · 23rd October 2005, 07:24 PM

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 · 23rd October 2005, 08:23 PM

Thx Nisbeth,

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

Nisbeth · 23rd October 2005, 08:34 PM

Much better

/U.

Russ White · 23rd October 2005, 09:46 PM

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 · 23rd October 2005, 10:37 PM

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

Russ White · 23rd October 2005, 10:40 PM

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 · 23rd October 2005, 10:42 PM

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

Russ White · 23rd October 2005, 10:47 PM

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 · 23rd October 2005, 10:59 PM

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

23rd October 2005, 10:37 PM	#6
Evilsizer diyAudio Member Join Date: Nov 2004 Location: Texas	looks good! btw what is the size of the board so far? __________________ "I Love To Camp!" "Comensing Shock Therapy!"

23rd October 2005, 10:40 PM	#7
Russ White diyAudio Member Join Date: Jan 2005 Location: Nashville, TN, USA	Thanks! Well, its about 4.2" x 3.2" and it won't get any bigger, it may get a little smaller. Cheers! Russ __________________ Less pulp more juice Twisted Pear Audio.

23rd October 2005, 10:42 PM	#8
Ed LaFontaine ...truth seeker... diyAudio Member Join Date: Feb 2004 Location: where the Appalachians rise from the Blue Grass	Hi Russ, Will there be an option to use off-board PS? __________________ ...call me Ed...Special Ed... EnABL kit http://www.diyaudio.com/forums/swap-meet/119852-enabl-kit.html DCB1 parts http://www.diyaudio.com/forums/swap-...ml#post2361098

23rd October 2005, 10:47 PM	#9
Russ White diyAudio Member Join Date: Jan 2005 Location: Nashville, TN, USA	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. __________________ Less pulp more juice Twisted Pear Audio.

23rd October 2005, 10:59 PM	#10
Russ White diyAudio Member Join Date: Jan 2005 Location: Nashville, TN, USA	Actually I meant including the regs. You would omit them as well. __________________ Less pulp more juice Twisted Pear Audio.


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23rd October 2005, 07:24 PM	#2
Nisbeth diyAudio Member Join Date: Jan 2001 Location: Denmark	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

23rd October 2005, 08:34 PM	#4
Nisbeth diyAudio Member Join Date: Jan 2001 Location: Denmark	Much better /U.

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