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Old 7th February 2013, 01:55 PM   #151
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Quote:
Originally Posted by KatieandDad View Post
No mine is as per your diagram. Supplied by the same Chinese supplier. I just assumed it was a PIC.
ok,
Don't know if your board have same pin layout as mine see my link to Board

You have to get a new chip ATMEGA8515 and program it with the code
and make the change on the pcb as in post
you can use many diffrent programmers for this
I use Bascom-avr and Atmel Studio
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Old 7th February 2013, 02:06 PM   #152
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Yep, Mine looks exactly the same, just the markings on the micro are different.

Question was, How do you reprogram the new micro ?

If I need to buy a PIC (or whatever) programming board and the software to go with it, it ain't worth it. Dusty Bin can have a feast.

I only paid £19.00 for the cr*p kit in the first place.

Last edited by KatieandDad; 7th February 2013 at 02:09 PM.
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Old 7th February 2013, 02:20 PM   #153
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Quote:
Originally Posted by KatieandDad View Post
Yep, Mine looks exactly the same, just the markings on the micro are different.

Question was, How do you reprogram the new micro ?

If I need to buy a PIC (or whatever) programming board and the software to go with it, it ain't worth it. Dusty Bin can have a feast.

I only paid £19.00 for the cr*p kit in the first place.
You need a programmer to program the chip and Fusebits
software for programmers are free on net , just be sure that the programmer can program fusebits Atmega8515 is default 1Mhz int we run 8Mhz int

I dont have time to make a long list of programmers and software so check the web for it

How can I help :
if you like I can program a chip and ship it to you
all you need is pay for chip and shipping cost from Denmark
or you can send me a chip (ATMEGA8515) and I program it) and ship back to you

before you do this check post #1 schematic to be sure it's same layout
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Last edited by FarmTech; 7th February 2013 at 02:23 PM.
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Old 7th February 2013, 02:36 PM   #154
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I've had to send the kit back to China for the time being. The PCB that I bought had the rectifier diode silk screen orientation round trhe wrong way which caused a bit of damage. The vendor wants to see the boards.

How much would a programmed chip be ? I might just sent the kit to you so that you can verify your work before you return it, that would save any animosity due to confusion.

What crystal is on your PCB ? Mine has a 12MHz crystal.

Last edited by KatieandDad; 7th February 2013 at 02:40 PM.
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Old 7th February 2013, 02:47 PM   #155
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Quote:
Originally Posted by KatieandDad View Post
I've had to send the kit back to China for the time being. The PCB that I bought had the rectifier diode silk screen orientation round trhe wrong way which caused a bit of damage. The vendor wants to see the boards.

How much would a programmed chip be ? I might just sent the kit to you so that you can verify your work before you return it, that would save any animosity due to confusion.

What crystal is on your PCB ? Mine has a 12MHz crystal.
around 10£ inc shipping cost (5.8£)

crystal is same but I see 1 Cap to lcd backlight the yellow one left site
and connectors top right is not same
but that dont mean its not same chip pin layout as mine
about the rectifier diode maybe the PGA2311 is dead from this error wrong power in +-5V
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Last edited by FarmTech; 7th February 2013 at 02:55 PM.
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Old 7th February 2013, 02:58 PM   #156
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I think the regs protected the PGA2311. They did not output anything with reverse polarity input.

I was amazed, the two regs smoked like a burning building but were both still OK after testing. I only applied the reverse power for less that a second.

Anyway, hopefully Chinese vendor will sort that out as that was his mistake. You will notice that the four rectifiers are noe apparently the wrong way round (this is how they should be)

£10 sounds fine to me.
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Last edited by KatieandDad; 7th February 2013 at 03:01 PM.
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Old 7th February 2013, 03:16 PM   #157
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KatieandDad , do you have sch of the boards ?
then its easy to compare pin layoout of the mcu chip
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Old 19th July 2013, 09:05 PM   #158
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Hi, KatieandDad !

Can I write your source http://www.diyaudio.com/forums/attac...rmtech_nec.zip

on this chip Atmel at89c52 or I must use ATmega8515 ? Is It works?
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Old 22nd February 2014, 11:48 AM   #159
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Hello FarmTech,

today i modify my China-PGA2311 and program a m8515 with your code and it works fine. Thank You.
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Old 22nd February 2014, 03:49 PM   #160
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HI yaumatei ,

Tnx for the feedback enjoy it
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