Unraveling...

Reworking PCB redesigns and unraveling all the interwoven tracking and component placement without destroying the whole design is hard. Sometimes it is just easier to start again!

As I have been reviewing all the designs I have slowly been making lots of small changes, and lots of small changes leads to lots of PCB rework. This is fine but I am becoming more and more busy with life these days so it will take some time. And in fact just starting from scratch on several PCB layouts may be quicker than trying to work out what I did last time.

Also now looking at ADC options. The TI PCM4202 is a nice spec ADC chip but seems to have fragile I/O pins. One wrong setting or connection on the I2S interface can cause permanent damage. It would be good to have something a little more robust in it's place. Again this would be another new PCB layout, or several if other revisions are needed to fix any issues.

We will get there eventually!