My latest project - DAC + headphone amp - Page 9

Ryssen · 4th May 2006, 06:49 PM

Quote:

I also have AVR ISP programmer. I just happen to pick it up for future AVR Adventures

Can you do the programing for me/us would be stubid if I buy this card and can´t use it.

KimBOlesen · 4th May 2006, 07:26 PM

Hi

Link to a simple AVR programmer:

http://www.myplace.nu/avr/yaap/index.htm

connector and 5 resistors works...

Best regards Kim Olesen

Geek · 5th May 2006, 06:41 AM

Hi Gmarsh,

Do you have a closeup picture/scan of the top of the PCB's available?

Geek · 5th May 2006, 07:26 AM

The blank (unpopulated) PCB's?

Also, someone asked for schematics and stuff. My Guru made these from Eagle layouts:

Schematic
Topsilk

Geek · 5th May 2006, 08:01 AM

Moderation: Please delete above two posts of mine.

rjkdivin · 19th May 2006, 08:58 PM

gmarsh,

I got myself an AVR ISP MKII programmer, and have downloaded the ATMEGA8L datasheet and ATMEL Pers Comp Program, but I am very new to this........are there some helpful hints as to what programming is required, or some specific code you can provide?

Any further help would be greatly appreciated.

I know we don't even have boards yet, but I'm getting ready!

Robert

Ryssen · 19th May 2006, 09:07 PM

Sounds good,too rely on you for programming.

gmarsh · 21st May 2006, 07:39 PM

Quote:

Originally posted by rjkdivin
gmarsh,

I got myself an AVR ISP MKII programmer, and have downloaded the ATMEGA8L datasheet and ATMEL Pers Comp Program, but I am very new to this........are there some helpful hints as to what programming is required, or some specific code you can provide?

Any further help would be greatly appreciated.

I know we don't even have boards yet, but I'm getting ready!

Robert

Attached is the most recent Mega8L code for the DAC - .hex file ready to program, C source file and makefile. It's the same as the previous code except L/R aren't swapped anymore.

To recompile, you'll need WinAVR - http://winavr.sourceforge.net/

Set the Mega8L fuses/flags for a 4MHz IntRC oscillator when you program.

(edit: file is actually attached now)

matjans · 23rd May 2006, 08:23 AM

hey guys,

sorry about not getting back to you for the group buy. I've been too busy lately with my last exams and preparations for my final thesis.

Unfortunately my studies take up so much of my time I have to pull out. That, and the fact that i'm *totally* broke (which is normal for a student, i suppose). Sorry 'bout that.

I wish all of you good luck building & listening! Maybe if there's going be a second run i'll step in again. I've been dying for a good headphone amp. I'll have to do with the good 'ol m-audio audiophile usb for now. Good thing foobar finally has a decent asio output plugin.

Matt

kct · 24th December 2006, 08:41 AM

Hi,

I am new here and came across this project thread while searching for a nice headphone amp with digital in. This is exactly what I was looking for. Thanks to gmarsh for sharing this great project with the general public. This is awsome.

So I guess I missed the boat for a PCB, if someone still has an extra one I like to buy it. Or if another group buy comes up, please count me in for a PCB.

Cheers

Kay

19th May 2006, 08:58 PM	#86
rjkdivin diyAudio Member Join Date: Oct 2005	AVR Programming gmarsh, I got myself an AVR ISP MKII programmer, and have downloaded the ATMEGA8L datasheet and ATMEL Pers Comp Program, but I am very new to this........are there some helpful hints as to what programming is required, or some specific code you can provide? Any further help would be greatly appreciated. I know we don't even have boards yet, but I'm getting ready! Robert

19th May 2006, 09:07 PM	#87
Ryssen diyAudio Member Join Date: Dec 2003 Location: Sweden--> Here	Sounds good,too rely on you for programming. __________________ Regards Åke

23rd May 2006, 08:23 AM	#89
matjans diyAudio Member Join Date: Aug 2003 Location: Utrecht, NL	hey guys, sorry about not getting back to you for the group buy. I've been too busy lately with my last exams and preparations for my final thesis. Unfortunately my studies take up so much of my time I have to pull out. That, and the fact that i'm totally broke (which is normal for a student, i suppose). Sorry 'bout that. I wish all of you good luck building & listening! Maybe if there's going be a second run i'll step in again. I've been dying for a good headphone amp. I'll have to do with the good 'ol m-audio audiophile usb for now. Good thing foobar finally has a decent asio output plugin. Matt __________________ Si fractum non sit, noli id reficere!

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4th May 2006, 07:26 PM	#82
KimBOlesen diyAudio Member Join Date: Aug 2005	Hi Link to a simple AVR programmer: http://www.myplace.nu/avr/yaap/index.htm connector and 5 resistors works... Best regards Kim Olesen

5th May 2006, 06:41 AM	#83
Geek diyAudio Member Join Date: Sep 2004	Hi Gmarsh, Do you have a closeup picture/scan of the top of the PCB's available?

5th May 2006, 07:26 AM	#84
Geek diyAudio Member Join Date: Sep 2004	The blank (unpopulated) PCB's? Also, someone asked for schematics and stuff. My Guru made these from Eagle layouts: Schematic Topsilk

5th May 2006, 08:01 AM	#85
Geek diyAudio Member Join Date: Sep 2004	Moderation: Please delete above two posts of mine.

24th December 2006, 08:41 AM	#90
kct diyAudio Member Join Date: Dec 2006	Hi, I am new here and came across this project thread while searching for a nice headphone amp with digital in. This is exactly what I was looking for. Thanks to gmarsh for sharing this great project with the general public. This is awsome. So I guess I missed the boat for a PCB, if someone still has an extra one I like to buy it. Or if another group buy comes up, please count me in for a PCB. Cheers Kay

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