DIY MP3 decoder / DAC project

CrazzyAbtTubes · **Posted:** 27 Oct 2009 6:23 pm

Try a bigger filter cap like 1000uF, but it should not make that much of a difference, it is most likely an annoying ground loop that I end up with in just about every project I make because it is hard to make all of the ground wires go to one ground post, so when I touch something like a pot contact or the outside of an RCA jack the noise would either get worse or better.

tjolle62 · **Posted:** 28 Oct 2009 11:25 am

Ohyeah ! our old common friend Mr Groundloop

Almost forgot all about him by now.
He just got to be related to Mr Murphy somehow

i give'it a shot to connect power ground ( - ) to line out ground and see or (hear) what happen's,

Regards,
Kjell.

tjolle62 · **Posted:** 30 Oct 2009 10:56 am

Problem solved !
on L78xx series is tab ground so a small wire from - ( neg ) side to ground took care of that and
now it sounds even after 6 hours just :up:

Regards,
Kjell.

Geek · **Posted:** 30 Oct 2009 4:14 pm

Great!

I think word on this thing is getting around. I've been sniped at every auction for one

If you look at the sales history, they've been steadily increasing in final bid price.

Cheers!

tjolle62 · **Posted:** 30 Oct 2009 4:45 pm

Hi Geek,
Yeah i noticed that too and for once i plead not guilty :shock:

i think i got mine for close to 12 buck's and some went for almost 20 i belive,
kind of strange with all those millions of items on e-bay and this guy is the only one who have them
could be that he makes those and if not it should be a manufacture of those and maybe we should
track this builder down and try to buy a s**t load of them :idea:

I know for sure that i could easy sell 30 of them.
I also looking into the IC itself that is a Mp3 decoder and a piece of pcb and some sockets for usb
and a memory card and build my own unit maybe

Regards,
Kjell.

Geek · **Posted:** 30 Oct 2009 9:01 pm

I'm useless at chip programming, otherwise adding a display to this would be a super advantage.

Cheers!

Geek · **Posted:** 30 Oct 2009 11:14 pm

Yay! I finally won one of the darn things! :present:

tjolle62 · **Posted:** 31 Oct 2009 1:39 am

Congratulation :sing:

I'm since a few days looking around for a "drop in" display and when it's a output for'it so why not, would be pretty cool huh !

Geek · **Posted:** 31 Oct 2009 4:10 am

Thanks!

If you find a display, please let us know :king:

Cheers!

Geek · **Posted:** 23 Nov 2009 10:10 pm

I got mine today, but the resonator was smashed :bawling:

The unit otherwise is physically OK and the bubble wrap and envelope shows no sign of damage, so it couldn't have happened in shipping (likely he got a lemon and didn't notice it).

Hopefully he can arrange a replacement.

Cheers!

DIY MP3 decoder / DAC project

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