This project Access Control System is used in the places where we need more security. It can also used to secure lockers and other protective doors. The system comprises a number keypad and the keypads are connected to the 8 bit microprocessor 8085 through the programmable peripheral IC 8255. This is one of the popular microprocessor.
The microprocessor continuously monitor the keypad and if somebody enters the password it will check the entered password with the password which was stored in the memory and if it they are same then the microprocessor will switch on the device.
In our Project we are controlling a electrical device. The password can be an four digit number. If we enter the correct password then the microprocessor will switch on the load. If we want to switch off the load simply press the digit 0 in the keypad.
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