Hi Guys, I am a newbie to electronics but love to get started learning. So after a few google searches and YouTube videos, I have decided build my own variable Power Supply using an old Computer ATX Power supply for my further learning and future projects.
When I take the power supply apart, the first thing I've noticed behind the AC main input male socket was 2 capacitors from L & N parallel to the Ground, a resister across L and N. Also some component packed in white plastic across L and N.
I have learned to purpose of resister and capacitors. But cannot control my curiosity why such configuration needed in an AC input(at least in this case)? Also what is the component in white package? Please excuse if this is a stupid question. I hope someone can explain. Thanks in advance.