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can any one plz guide me how to interface keypad with at89c51 microcontroller i followed the cct diagrame that was given on net but my cct is not detecting any input on keypad and on my lcd there are only black boxes.
plz can any one can guide me.
Help! regarding keypad and microcontroller at89c51
can any one plz guide me how to interface keypad with at89c51 microcontroller i followed the cct diagrame that was given on net but my cct is not detecting any input on keypad and on my lcd there are only black boxes.
plz can any one can guide...
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