Description: AT89X52 4 × 4 keypad and 8-bit digital tube display consisting of electronic locks. 4 × 4 with the composition of the number keys 0-9 and confirm key. With 8-bit digital tube display circuit message, when the input password, only shows " 8." , When the median enter password press the confirm button when finished to set the password with the password for comparison, if the password correct, then the door opened here with a bright LED light-emitting diodes as a matter of seconds suggests that at the same time issued a " ding dong" sound if the password is not correct to prohibit the importation of key three seconds, at the same time issued a " 嘀,嘀" alarm sound if there are still three seconds of pressing the button, the button to prohibit re-importation ban on three seconds.
To Search:
- [Lock] - Single-chip electronic locks excerpt fro
- [keylock2] - MCU-based source of electronic locks, as
- [111111] - Curriculum-based single-chip design of e
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