Always begin by testing the rest of the system to determine if the issue lies with the keypad itself or some other component ...

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Video quality includes image clarity, color accuracy, and contrast in bright, dim, and no light situations. It's based mainly on the judgments of a panel who viewed images captured by a mobile device.

With the mechanical portion of the project out of the way, he spent a great deal of time working on the door’s electronic components, including the PIC-based controller and capacitive keypad.