Microchip Technology

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  • Electronic Combination Lock

  • Created: Aug 25, 2014

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This circuit is another type of access control system. It uses combination of numbers as its primary requirement to unlock the system. It is simple and easy to develop as part of the other system.

The PIC16F84A-04/SO 8-bit microcontroller with enhanced FLASH/EEPROM is used to handle the entire data instructions of the system. The relay is used for the combination lock. An LED is provided for visual indication and buzzer for sound indication. The pushbuttons are used to enter and set up the codes.

This project is an excellent reference to develop more sophisticated design of access control system. It is simple that even an average student could comprehend it.



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