4 × 4 and confirm the composition of the number keys 0-9 keys. With 8-bit digital tubes display circuit prompts when a password, only show " 8." , When finished press Enter to confirm the password digit key, the input The password to compare with the password, if the password is correct, then the door opened, light emitting diode LED used here as a second prompt, also issued " Ding Dong" sound If the password is not correct, against key input for 3 seconds also issued a " tick, tick" sound alarm if there within 3 seconds press the button, then the ban button for 3 seconds to be re-importation ban.

4×4键盘及8位数码管显示构成的电子密码锁源代码.doc

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