Finally after a thousand cups of coffee (for me that is) it is actually playing music again. This time through the last TDA1545 DAC chip that I haven't destroyed. This is a clone of the "Monica" DAC. I can not comment that much on the sound, since it has been a while since the TDA1543 DAC, was playing, but it sounds nice, and definitely different. If you have some spare chips and time, try it for yourself.
In the final version, R1 is 33k, and C7 has been omitted. C7 seemed to be the part causing the 2 DAC chips to die, I'm not sure why, and I'm not sure the final solution is to leave it out, but since I'm at my last chip, It'll stay that way for a while. Also check the output from the current source between R4 and D1, if above 6V, short out D1, D4, and D7.
Damn that horse! I have spend much of the day building a TDA1545 version of my DAC, but with no success. The CS8412 SPDIF -> I2S/EIAJ converter locks to the signal, but only noise comes out from the DAC. Maybe I will have to resurrect the TDA1543 board, to make sure everything in front of the DAC, still works.
For a couple of weeks now my backspace key has only been working sporadicly, being frightened that I might hammer they key to atoms, I decided to try and clean it. First I found the service manual of my Dell Inspiron 1300, and pulled out the whole keyboard, only to realize, that I was unable to tear it apart like a normal keyboard. The plastic parts had some pins going through the metal baseplate, these had then been melted flat to keep the thing together. If I pulled these "weldings" apart, I would never be able to assemble the thing again.
In this case google wasn't a friend, since it was only concerned with "sticky" keys, and I do not use sugar in my coffee.
I had an editor running, so that I could see the key, slowly began working. I then replaced the plastic part, and the button, and it is working again!
Generated on 2017-03-19 22:52:04.507569