Electro Labs has posted a detailed tutorial on why and how to use bypass capacitors:
You may have heard about the phenomenon of bypassing in circuits, however, we may not have sufficient knowledge of how to apply this technique in real circuits. In this tutorial, we will discuss about the bypass capacitors, why we need to use and how to use these capacitors in circuits.
Via Hacked Gadgets.
Does anyone read these articles before blogging about them?
Just curious.
If the actual article contains garbage, then the blog that refers to it may be imputed by some to possess the same credibility.
Just like my Dad used to say…”You can fix anything with a cap.”
I’ve done a german video about the need of bypass-capacitors:
https://www.youtube.com/watch?v=AP_FSyWGpoE
Overly simplistic, has some common rules of thumb, and woefully incomplete. Some of the recommendations can even cause more problems, like using arrays of multiple values of capacitors, see this article from Howard Johnson. In fact, just check out Howard Johnson’s collection of articles on bypass capacitors for a far better reference. Honestly, if your circuit needs more than a bulk at the power entry point and a 0.1uF at each power pin, you will save yourself a lot of grief by reading Howard Johnson’s website.