Hello all,

This is how the fix looks like

Now it looks quite bad, but it works kind of good. This is wat we have now on the ADC pin of the XIAO

Now there are a few differences. Because the excitation pads are smaller the charge on the them is smaller and the useful signal is smaller. This makes the noise to signal ration bigger. And this is why we see a bit fuzzier signal. 

The high part of the signal is sloped. My theory about that is there is a bit of overshoot on the excitation signals. This is normal since I soldered a bunch of signals.

A think when I put the shift register on the board this will be mitigated to a large extend.

Time for some KiCAD action. 

Cheers,

M