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Old 18th June 2011, 02:48 PM   #1
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Default 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.
Click the image to open in full size.
Here is the overall project including a video of the preamp section.
Dave's Multi Zone Stereo / STM32 Design Challenge page

Enjoy,
Dave Erickson
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Old 18th June 2011, 03:18 PM   #2
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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
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Old 3rd July 2011, 08:30 AM   #3
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do you have schematic,can you send to me,thanks! my email:cityfeng29@sina.com
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Old 4th July 2011, 04:18 PM   #4
AndrewT is offline AndrewT  Scotland
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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?
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Old 6th July 2011, 07:03 AM   #5
a.wayne is offline a.wayne  United States
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^^ We wont know until his 5th response......
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Old 6th July 2011, 09:30 AM   #6
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don't hold your breath a.wayne

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

Tony.
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Last edited by wintermute; 6th July 2011 at 09:35 AM. Reason: add on topic comment :)
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Old 8th July 2011, 06:21 AM   #7
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Quote:
Originally Posted by AndrewT View Post
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.
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Old 9th July 2011, 06:22 AM   #8
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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.
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Old 13th July 2011, 12:10 AM   #9
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Originally Posted by AndrewT View Post
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?
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Old 13th July 2011, 09:57 AM   #10
AndrewT is offline AndrewT  Scotland
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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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