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  1. #1
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    digital lock circuit

    hi,
    i would like some help on how to introduce a keypad for data entry and output the status on a 7 segment display. what components would i need?? here is the schematic for the circuit. thnx.
    Simple combination lock : DIGITAL INTEGRATED CIRCUITS

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  2. #2
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    Re: How to introduce a keypad for data entry and output the status on a 7 segment dis

    Duplicate the switches 4 set, you will have your keypad

    ---------- Post added at 18:15 ---------- Previous post was at 18:15 ----------

    as well as the led accordingly, then use decoder to decode it to 7 segment ~~

    ---------- Post added at 18:16 ---------- Previous post was at 18:15 ----------

    you might want to consider microcontroller, you just need some codes rather than messy hardwares :)



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