gurutzeta HELP ME!! for the dirtysam's project....

[mathflan]

Hi,


So it's the second times that I build the dirtysam.

http://humano.ya.com/guruzeta/Guitarra/dirtysam/

The first time, the dirtysam didn't work , I suspected the bad quality on my PCB. SO i had make a second PCB.

But It's doesn't work again!

In fact I have a dirstortion sound at very low level. I have to play loud on my guitar to have a sound.

The volume rec pot and Tone works apprently but the play volume doesn't work.


How can I verify if is it  THe TL074, cd4070, lm386 or thz ISD 2560 which doesn't works.

I put a speaker at SP + and SP- of the ISD2560 and the sound is good so I think that it's not a problem with the ISD.

gurutzeta, did you have this problem.


Thanks

[ethrbunny]

I had a similar problem with the low sound.

Check the wiring order to the pots
Are LEDs working as they should?

I haven't been able to get a good playback sound though. Perhaps we can exchange notes (so to speak) as to pin voltages and such.

[mathflan]

I test the output of the lm386 with a speaker and the sound is good.

I test the ouput of the ISD with a speaker and the sound is good.

I test the output of the TL074 and the sound is saturates and low, but I change it and it's the same.

I don't have the playback sound and the playback' pot don't work.
where does this problem come from?

Etherbunny, No problem to speak together (messenger???)