My Previous DIY DAC

[mdlover]

Hi All,

This is my previous DIY DAC (a couple of years ago).

Two PCM63Pk sounds really great and the I/V section, I use AD846 for the I/V converter, I could say it may be specially designed for this job.

My next porject will be the Non-OS TDA-1541.

cheers

 

[mdlover]

Another closeup

 

[apassgear]

Beautiful work, mdlover.

On your next project which I/V are you planning?

 

[MCLL]

Here is my dac. But I think your dac may be difficult than me...

http://hk.photos.yahoo.com/leo8597

 

[mdlover]

Beautiful work, mdlover.

On your next project which I/V are you planning?

any good suggestion?

cheers

 

[mdlover]

Here is my dac. But I think your dac may be difficult than me...

http://hk.photos.yahoo.com/leo8597

your cdrom controller seems quite interesting, any info?

what DAC chip are you using? 43122? how is the sound?

cheers

 

[MCLL]

mdlover

I'm using AD1852 for my dac and sound is ok...

Refer to CD-Rom Controller...
**Include Source Code**

http://jsno.arafuraconnect.com.au/proj_micro/onhold_r2.html

 

[mdlover]

Hi MCLL,

Thanks for your info.

cheers

 

[takashi]

they use what software to draw sch?
i have d/l their file, but cannot open it.
thanks

 

[MCLL]

It should be use PCB Software to create that file such as Protel and I just use universal PCB to build...

 

[takashi]

i have tried to use protel 98 to open, but fail....
how can i open....
can you open it and print to PDF? please help

 

[takashi]

and also, i have d/l the zip file, but there are many a51 file, which one is ...

 

[MCLL]

Unzipped file and then using 'onhold_at89c51.a51' in onhold folder. I also can't to open it... Otherwise, I give up to all *.sch files due to I haven't any PCB Software. In LCD Module, you shoud change a 2.7K to 2K VR for contrast adjustment.

 

[takashi]

THANKS A LOT~

i am trying to understand the program and enhance it

 

[takashi]

hi, MCLL
have you try boot up the onhold R2 with out CDROM?
i have solder the board but it dosnt work, no display~

 

[MCLL]

takashi

At first, make sure CD-Rom MUST set to MASTER, NOT Slave... What brand name of your CD-Rom? Some CD-Rom can't to work such as acer, pioneer. Otherwise, LCD display still work and it can display cd-rom model but can't to smoothly play audio cd... However, I try to boot up controller without cd-rom connect. LCD should be display line 1 '-= Onhold R2 =-' line 2 'By Jason Nunn' then display line 1 'Initing', controller stop here... You should try to adjust 2K VR ...

 

[MCLL]

takashi

Recently, I search some Website for LCD & 8051 and some diyer change contrast VR to 20K... ... I will try to use 20K VR to adjust LCD contrast...

http://hk.photos.yahoo.com/leo8597

I had modified some source code but just display message like first message change to 'Welcome to CD-Rom Player'... . If you want to recompiler source code, you should have A51 compiler.

 

[purer]

your dac is very good

my art http://www.cndiyclub.com/bbs

Plese give some advice

 

[mdlover]

your works look nice too.

btw, which part of china are you located?

seems many good parts can be sourced from china.

cheers

 

[MCLL]

An externally hosted image should be here but it was not working when we last tested it.

Be careful ! Too many bad good !