Connecting Peripherals to Arduino

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hi,

this might silly thing ask here goes,
is okay plug in servos or other type of shield matter arduino while connected pc , external power source??
is necessary switch power off , disconnect pc  if have plug in servo or remove arduino, or shield?

thanks in advance.

you can not wisest thing in world (this why complain arduino needs simple toggle switch power) when hot plug things not protected electrically sorts of nasties potentially happen.

human error biggest elephant in room, other things esd, bouncing pins, current inrush invite failure, either instant or on time not idea unless been designed to.


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