KenHahn
Member

I once had to cut large 4-layer boards down in size and found that a bandsaw with a fine tooth blade did a good job. Main issue that came up was that the internal power/gnd planes would occasionally short due to...

If you can't attach a PDF, try capturing the schematic as a PNG image. PNG preserve the image detail better than JPG.

Looking at your diagram, I notice a few possible issues. The maximum allowable voltage on the VIN pin that feeds the RT1060 CPU chip and 3.3V regulator is 5.5V. When you say a 5-6V power bank, you may be damaging...