How much of a task would it be to just use connections to connect one arduino pin to the corresponding ones on the shield slots? What is preventing that?
So something like this - each header with a jumper pad to connect the header to an arduino signal, either the one adjacent to it, or to a different one. Only +3.3, +5, and Gnd are connected.
It will connect if you put a wire between the inner hole at D10 to the middle hole.A board with no jumpers would have no signal connected at the 3 sets of female headers, only +5, Gnd, and 3.3V.Hmm, no 3.3V regulator. Maybe I should add one. 5V is expected to be supplied via 5V wallwart, 4.5V battery pack, or similar.