Hi Everyone,
I’m totally new to PCB design and I have a basic question that I cant find an answer to online. When using software like Eagle or similar to design PCBs, are components like resistors, capacitors and transistors built into the board or do they need to be purchased separately and soldered down? I would think the latter, however I’m confused because when I look at a design board like Arduino, you cant see any of these components soldered to the board. Sorry for the noob question.
Thanks!