In Electronics Access control system , we will control the door using password protection. In thisd project we will control it using microcontroller 89C051. we will use key matrix to enter data, if entered data will match with stored data in microcontrolller, then only it will allow the door to open , otherwise it will remain locked.
The main key in this project is coding of password.we will use stepper motor to open the door , so that door will open step by step.
We will use LCD display to show the entered password.
It will also show the entered password match with stored password, if the password will match then it will show access successful, otherwise it will show denied. LCD dislay will also show clock. if entered password three times denied, then it will move the programmer in continuous loop & will not allow to entered password.
When signal match with the stored password then microcontroller will give its output to stepper motor circuit through port3. it will give supply to stepper motor & rx pulses from microcontroller .
Then dooor will open.
LCD display- entered password show on LCD
Programmable- flexible- programming can be change , so this project is flexible
Component easily available
General use for security system
1. Security System of offices,lockers,rooms
2. For cranes – we can make cranes with same logic
3. For lift control- with change in programming we can change in to lift control circuit
LCD display 16*2 matrix
Wood or ply
Resistance 220 ohm
Capacitor 0.01 micro farad
Keyboard general or push to on Button
Microcontroller programming kit
copper clad board