This site has examples of commonly used IC's with a PCB layout that can accommodate most applications. The circuits are given, with the PCB layout and the values of the components.
The PCB makes it easier and faster to construct, but one has to follow the construction sheets very accurately, as the board has been designed to accomodate various applications of the devices in question, and placing a component in the wrong position, may lead to some surprises!
If you have a project you want to share with others, please only one or two pages, then make an attachment and email me at zinzan2903@GMAIL.COM