====== Circuit Board ====== A printed circuit board (PCB) mechanically supports and electrically connects electronic components using conductive tracks, pads and other features etched from copper sheets laminated onto a non-conductive substrate. Components – capacitors, resistors or active devices – are generally soldered on the PCB. Advanced PCBs may contain components embedded in the substrate. ([[https://en.wikipedia.org/wiki/Printed_circuit_board|source]]) {{scribblenauts-unlimited:c:circuit-board.jpg}}