Custard pi system custard pi custard pi 8 prototyping board the custard pi smt and through hole prototyping board provides a prototyping area for both surface mounting and through hole devices the smt pads are brought out to plated through holes that are easy to wire to connection points include smt ic breakout pads for a narrow body 015in or wide body 03in with up to 16 pins smt ic breakout pads for a narrow body 015in with up to 16 pins and wide body 03in with up to 20 pins