Before revision: 400 point solderless breadboard with hole-to-hole spacing, top view and bottom view A breadboard, solderless breadboard, or protoboard is a construction base used to build semi-permanent prototypes of electronic circuits.
After revision: 400 point printed circuit board (PCB) breadboard is electrically equivalent to the solderless breadboard above400 point solderless breadboard with hole-to-hole spacing, top view and bottom view A breadboard, solderless breadboard, or protoboard is a construction base used to build semi-permanent prototypes of electronic circuits.