This board is used in developing prototype circuits for the STRUIX system. ProtoPad One is the building block for circuits NOT requiring a connection to the main board serial programming port - so there is an extra row of holes.
ProtoPad One has a traditional 0.1" (2.5mm) layout. Buss power is routed horizontally along the center from the +/- pads, while component connections are made along individual vertical paths.
Connections for all perimeter pads are available at the outside of the grid. Perimeter pad holes are set up for stacking with M3 hardware.