Tip of The Day : Decoupling Capacitor

There is one type of component that appears in almost every type of design: the decoupling capacitor.
The word “decoupling” really means “noise-absorbing”.
These capacitors are located on the power input pins of nearly every type of active device.
Their purpose in life is to absorb (or more correctly, shunt to ground) electrical noise which is generated in the active device.