Decoupling capacitors between supply pins of ics

[greylourie]

Good to know about and sometimes nice to have. You can search the internet and see the subject crop up time and again. But like Qiaozhi and Silver Dollar mention above, in many cases no discernable gain from having them. Perhaps for the electronically illiterate like myself, its just as important to learn that attempting to implement bypassing/decoupling incorrectly - can lead to a poorer result than simply not having any in the first place.

[surfdetector]

Hello kt315, Thank you for your reply.

At first I was confused by what you wrote and read many articles about it and how to measure.
A whole new world has opened up to me and I will be getting an ESR meter, most run @ 100 kHz anyway, so no problem.
Which one do you have? The red or blue or homebrew?

What amazed me when researching capacitors is that ceramic caps except COG's have a helluva loss of capacity dependent upon applied voltage.

I intend to de-couple the Baracuda PI and Surf PI and see if it makes a noteworthy difference. At the moment I intend to using 0.1uF Ceramics and 1uf Electrolyte
or Tantalum in parallel.

@Polymer,
I am curious if you went ahead and added decoupling capacitors to any of your PIs and if so what your experiences were?
Cheers