Whole House Audio system using LM3886s

djerickson · 18th June 2011, 02:48 PM

I recently designed a Whole-House Audio system with 8 zones, input selection and a preamp per zone. It uses an STM32F Arm Cortex M3 processor and was a winner in the ST Microsystems Design Challenge.

Now on to the multi-channel amplifier section, based on an LM3886 based 4 channel amplifier module. The amps are working well, next is to package it in an enclosure. Here are 12 amplifier channels, built with ExpressPCB Mini Boards.

Here is the overall project including a video of the preamp section.
Dave's Multi Zone Stereo / STM32 Design Challenge page

Enjoy,
Dave Erickson

abraxalito · 18th June 2011, 03:18 PM

Very interested to read of your adventures with Cortex M3. Will the next iteration dispense with the analog stuff and be fully digital?

If you'd like to upgrade your LCD at some point in the future then you might find Rossum's work interesting:

rossum's posterous - Home

cityfeng · 3rd July 2011, 08:30 AM

do you have schematic,can you send to me,thanks! my email:cityfeng29@sina.com

AndrewT · 4th July 2011, 04:18 PM

Cityfeng has posted 4 times. Three ask for schematics and one say nice.

Is this someone starting up a far east business by using this Forum for design expertise?

a.wayne · 6th July 2011, 07:03 AM

^^ We wont know until his 5th response......

wintermute · 09:35 AM

don't hold your breath a.wayne

Nice work Dave! are you planning on giving us some more details?!

Tony.

visioninscience · 8th July 2011, 06:21 AM

Quote:

Originally Posted by AndrewT

Is this someone starting up a far east business by using this Forum for design expertise?

by his email they look china based, so i'd say yes.

visioninscience · 9th July 2011, 06:22 AM

dj, that project is something else. I really like the youtube vid, it's thorough and provides a useful description of each portion of the design, and how they are tied together.

panson_hk · 13th July 2011, 12:10 AM

Quote:

Originally Posted by AndrewT

Cityfeng has posted 4 times. Three ask for schematics and one say nice.

Is this someone starting up a far east business by using this Forum for design expertise?

all design material can be downloaded from the design web page. why ask here?

AndrewT · 13th July 2011, 09:57 AM

Possibly because his wants free designs without any input of effort.

Looks more like a PCB house trolling for new business.

18th June 2011, 02:48 PM	#1
djerickson diyAudio Member Join Date: Feb 2005 Location: Topsfield, MA	Whole House Audio system using LM3886s I recently designed a Whole-House Audio system with 8 zones, input selection and a preamp per zone. It uses an STM32F Arm Cortex M3 processor and was a winner in the ST Microsystems Design Challenge. Now on to the multi-channel amplifier section, based on an LM3886 based 4 channel amplifier module. The amps are working well, next is to package it in an enclosure. Here are 12 amplifier channels, built with ExpressPCB Mini Boards. Here is the overall project including a video of the preamp section. Dave's Multi Zone Stereo / STM32 Design Challenge page Enjoy, Dave Erickson

18th June 2011, 03:18 PM	#2
abraxalito diyAudio Member Join Date: Sep 2007 Location: Hangzhou - Marco Polo's 'most beautiful city'. 700yrs is a long time though... Blog Entries: 62	Very interested to read of your adventures with Cortex M3. Will the next iteration dispense with the analog stuff and be fully digital? If you'd like to upgrade your LCD at some point in the future then you might find Rossum's work interesting: rossum's posterous - Home __________________ When a measure becomes a target, it ceases to be a good measure. C.A.E. Goodhart

6th July 2011, 09:30 AM	#6
wintermute just another diyAudio Moderator Join Date: Aug 2003 Location: Sydney Blog Entries: 22	don't hold your breath a.wayne Nice work Dave! are you planning on giving us some more details?! Tony. __________________ Any intelligence I may appear to have is purely artificial! Some of my photos Last edited by wintermute; 6th July 2011 at 09:35 AM. Reason: add on topic comment :)

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3rd July 2011, 08:30 AM	#3
cityfeng diyAudio Member Join Date: Jul 2011	do you have schematic,can you send to me,thanks! my email:cityfeng29@sina.com

4th July 2011, 04:18 PM	#4
AndrewT diyAudio Member Join Date: Jul 2004 Location: Scottish Borders	Cityfeng has posted 4 times. Three ask for schematics and one say nice. Is this someone starting up a far east business by using this Forum for design expertise?

6th July 2011, 07:03 AM	#5
a.wayne diyAudio Member Join Date: May 2008 Location: Front Row Center	^^ We wont know until his 5th response......

9th July 2011, 06:22 AM	#8
visioninscience diyAudio Member Join Date: Jul 2011 Location: east coast, usa.	dj, that project is something else. I really like the youtube vid, it's thorough and provides a useful description of each portion of the design, and how they are tied together.

13th July 2011, 09:57 AM	#10
AndrewT diyAudio Member Join Date: Jul 2004 Location: Scottish Borders	Possibly because his wants free designs without any input of effort. Looks more like a PCB house trolling for new business.

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