[IC question]

its an 8030 sound IC for touch sensitive alarm... :) :)...
... thanx for the reply.. :)

[IC question]

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!

[my first design.. pls help]

Thanks a lot ;D ;D ;D

[my first design.. pls help]

i forgot to display design... sorry...

i really really need your help, advice or correction on this one..THAnX

[my first design.. pls help]

hi.. i really need help correcting me with this one.. cuz i really know that there is something wrong with my design since this is my first one and im still a newbie..

by the way... this is a 9v power supply output.. and im using a transformer that is 220v 12-0-12.

heres the schematics and my design: