hi guys... im a newbie and im so confused by this.. pls help .. if an IC has 16 pins.. and only 4 pins are needed... does this mean that the 12 ramaining pins are useless?... and all i could do about them is give them a hole? i meant... putting an IC on a pcb that has 16 pins.. and only 4 is needed... what will i do for the remaining 12 pins?.. should i still make a hole for them with a ground on their own?.. or just a hole without any grounds.... THANX!