i need connectionsin pcb for converting ac voltage to dc voltage i.e 9v
AC can kill you if you do it
AC can kill you if you do it wrong.
With that out of the way, why dont you get a cheap wall plug like <a href="http://img.alibaba.com/photo/11354470/Power_Adapter_For_Laptop.jpg">this</a>? You can find them everywhere. Usually the item they powered broke before the power brick did so check around with family or friends to see if anyone has a spare one. </p><p>If youre still set on doing it yourself, you need a transformer, 4 high current diodes and a fuse to start. Googles first result for “power supply schematic” is this page. Lots of good stuff.