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mohdfasieh

help

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well i want to ask very basic question .
I am designing a DIGITAL LOCK for security system.The problem is that which KEYPAD i SHOULD USE and WHETHER KEYPAD CONVERTS OUR DECIMAL DATA DIRECTLY TO BINARY FORM OR WE HAVE TO USE ANY CONVERTER IC.
PLZ TELL THE NAME OF THAT IC .
Thz in  advance
plz plz reply

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