Part 2 of 2: This is the required extension board for use with Quantum Entanglement GWAAMC Aid v1.0 for Arduino UNO-type MCUs. The circuit function of this board is to reduce the resistance step size and, of course, total resistance of the MCP4262-502 by paralleling 26 of them together except for their pin 9s, which are not used at all. For connecting into the main board underneath SHLD3 connected by .5mm pins trimmed to length when solder cools. The solder of those pin connections will need to be very low profile workmanship. Full backside Kapton tape is advised to ensure insulation from main board and from SHLD3.

Order in 2oz copper to reduce risk of ENIG pads delaminating from the double-tinning required in ENIG.