DIGITAL LOCK Circuit

Discussion in 'The Projects Forum' started by urkutt, Jan 26, 2009.

  1. urkutt

    Thread Starter New Member

    Jan 26, 2009
    1
    0
    hi frndz

    I need circuit diagram of
    4 BIT DIGITAL LOCK
    My req is 1st of all we set a master reset pasword
    and thn set a user pasword
    when my user enter pasword if pasword is currect then my green lines will switch on else red LED remains on
    if user can forget there pasword then it can be reset my using my reset password
     
  2. thingmaker3

    Retired Moderator

    May 16, 2005
    5,072
    6
    Try an internet search on "digital comparator."
     
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