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| Digital Lock |
Now day’s ordinary locks are replace with digital locks. Those have very advanced features such as digital display, keypad, fingerprint recognized etc. Therefore, I decided to build basic digital lock with LCD display and keypad.
This is a micro-controller based digital lock circuit and it used PIC16F628A. 16x2 LCD is used for the display information and keypad is used for enter the code. (#) will clear the code and (*) will enter the code to initialize process.
Default code for this lock is 2468 and this code was stored in device Eeprom memory. You can change the default code by changing value of device Eeprom memory. Address 1 for first number, Address 2 for 2nd number, so on. You can change Eeprom value from zero to nine.
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| Schematic Diagram of Digital Lock |
Lock code = Eeprom Address 1 & …. & Eeprom Address 4
Ex:
Eeprom Address 1=3, Address 2=1, Address 3=0, Address 4=7 then,
Lock code => 3 & 1 & 0 & 7 => 3107
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| Eeprom Address and lock code |
Hi. Is it possible to share the code. Thanks for your help.
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