Your question is really too general. It depends a lot on your particular circuit configuration (I/Os, power source) and the anticipated environment. Do you have a specific application in mind?how to make protection for microcontroller of electromagnetic interference and noise in power supply?
I will design stepper motor drive circuit by PIC microcontroller with current control which has a high frequency so I want to make sheilding for controller to avoid any elctromagnetic interference and any electrical noise from supply
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