overdrive

Quite impressive work on those PCB's, well done on making such flexible modular system! Guess it took quite some placing/routing time to get it all right. - Why the white soldermask (=expensive), because of reflecting leds, or? - Why not change on one of the 2 "DIN&I2C" connectors, the MISO and MOSI, so u don't need crossing cables to link them? - Why use such oversized (=expensive) resistor arrays, u would done with >0.125W? - Are those solder jumpers to select adresses? - Your stackup, did u use 2 routing layers and 2 ground/power planes? Greetz Joost