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Old 17th February 2012, 01:33 PM   #1
diyAudio Member
Join Date: Dec 2009
Location: INDIA
Default PGA4311 with PIC Microcontroller Project


After using the analog control and source selection using the Switches for 10+ years I finally decided to build a Digital Volume control for my 6 Channel Amplifier.

i am almost new in PIC programming so will need help of community and you genius techies.

I have attached the schematic in PDF format. Please see and let me know if I am correct . Schematic is still not 100% complete . Need to add the Source Selection and LCD board along with switch panel.
I want to use this in my future TAS5630 based 8 Channel Amplifier(I already ordered PCBs).

I want to add following feature:
1. 8 channel Volume Control.
2. 3 ( 8 Channel each )source selection (for TV,PC,And DVD/BlU Ray)
3. LCD Display (using 16x2 LCD)
4. Switch Board for source selection with LED for each Source.

I am sure that I will be able to build it with your help.
I want to be this project as a total Open Source.

I will post all of steps code and ... on website. I find it very difficult to search and find a program so that I could just drop in chip and start using.

What I have :
1. Pickit 2
2. mPlabxIDE
3. PIC16F , 18F
4. PGA2311,2320,4311
5. Flowcode 4+
Attached Images
File Type: jpg Bottom_PGA_4311.JPG (93.7 KB, 299 views)
File Type: jpg TOP_PGA_4311.JPG (57.2 KB, 290 views)
Attached Files
File Type: pdf PG4311.pdf (70.4 KB, 79 views)
Thanks,Nalin B
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Old 17th February 2012, 02:05 PM   #2
stoc005 is offline stoc005  United States
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Join Date: Feb 2007
Location: Midwest in the USA
I like the project. Consider adding IR (or RF) remote as well for just adjusting the volume. Source selection will get expensive if relays are used. I'm familiar with the PIC series and find the Anduino based solution may be bit easier to get going. Either will work for this.
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Old 17th February 2012, 02:32 PM   #3
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Join Date: Dec 2009
Location: INDIA
Rf would be the second part as i think that it will be easy once i build the necessary functionality. I chose PIC as it is easily available and is cheap.

Once it start working i am thinking to go to ARM cortex that i got from ti along with AD sigma dsp with cs3318.

However i know that it will be the building block.
Thanks,Nalin B
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Old 11th April 2012, 06:07 PM   #4
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Join Date: Sep 2009
Default AC3 Dolby digital decoder


I did a project recently using PGA4311, dspic33F for control and online VU-metering with the embedded DSP core, 4xTDA7296 (60W each) power DMOS amplifiers, and two powerful SMPSs for 240W. The AC3 decoder is a modified AC3 gear (seems to be a Cirrus Logic device, but not sure) fitting to the housing.

See the figures attached. if you need some advice PM me.

Attached Images
File Type: jpg dss_final_back.jpg (126.2 KB, 227 views)
File Type: jpg dss_final_front.jpg (63.9 KB, 210 views)
File Type: jpg dss_final_internal.jpg (105.0 KB, 217 views)
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Old 19th April 2012, 06:45 AM   #5
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Join Date: Dec 2009
Location: INDIA
Default updated Schematic

Here is attached and updated schematic.

My progress is slow but hopefully I will ,ake it with all of your help..
Attached Files
File Type: pdf PGA4311pdf.pdf (66.9 KB, 90 views)
Thanks,Nalin B
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