Capacitors
A capacitor is a component that can store a small amount of electrical energy for a short period of time.
Capacitors are one of the most important tools for reducing electrical noise. They act like tiny energy reservoirs, absorbing unwanted disturbances and helping keep the power supply stable.
If you look at almost any electronic circuit board, you will find capacitors everywhere. They are placed near power supplies, microcontrollers, sensors, and many other components. This is not by accident. Each capacitor is there for a reason.
In many cases, simply adding the right capacitor in the right location can solve a noise problem that would otherwise be very difficult to track down.
Because they are inexpensive, effective, and easy to use, capacitors are often the first line of defense against electrical noise.