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Keypad Integration

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    AT89C51 Keypad
    28:17
    Keypad to 7 Segment Display
    9:41
    Keypad / EEPROM
    20:38
    4x4 Keypad Matrix using MM74C922 Decoder
    12:46
    4x4 Keypad
    5:33
    AT89C51 Part 2
    17:42