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MATRIX 4x4 keypad - Four digit

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puntoxacto

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I need a circuit to use a matrix keypad 4x4 to enter a 4 digit password, the password and the user should be used together with a 7seg display (of course 4 of them) Can anyone help me where I can find it ???
REgards,
 

IanP

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    puntoxacto

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