Password(code) Based Digital Locking System Using Microcontroller 89C52/89S52

entering of the password, the application as in this case `led` will glow. In this Digital locking system project you will learn more about interfacing keypad and 16x2 LCD to your micro controller along with the code. Since this project has been made in proteus software you must have a prior knowledge of it. If you are unaware of the software here
Password(code) Based Digital Locking System Using Microcontroller 89C52/89S52 - schematic

is a tutorial which i recommended in one of my previous articles. Other components like the crystal and switch are connected for the working of the microcontroller ( minimum circuitry required for proper working of the microcontroller). As soon as the power supply is provided to the microcontroller "password based" will be shown on the screen. This will remain for a second and after that "enter password" will be displayed as shown below. The "ENTER PASSWORD " statement will remain for a second and then it will vanish. At this point you will have to enter password which will be shown in terms asterisk " * ". The coding of the micro-controller is done such that only four numbers can be used to enter password. If you want to increase the length of the password you can do that by adding loops in the coding which will be dealt later. Here, in this project the password is set as 1234. when this password is entered the LCD will display "correct password" as shown below and the LED will turn on which is connected at port 1. you can set your own password by changing the password in the code.

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