MICROCONTROLLER BASED DIGITAL CODE LOCK

 Security is a prime concern in Industries. Every machinery in industry has to be much secure as possible. An access control forms a vital link in a security chain. The microcontroller based password operated machinery control allows only authorized persons to control the machines. The system is fully controlled by the 8 bit 8051 based microcontroller.

The system comprises of a small electronic unit with a numeric keypad which is fixed at the control panel through which password is entered. When an authorized person enters, a predetermined number (password) is entered via the keypad, microcontroller compares the predefined passwords and if the password matches then the user can operate the machinery through driver circuit. driver is an electronic switch type which is used to ON/OFF the machine/door. And if the entered password is wrong motor will be off and displays same on the LCD The system uses a compact circuitry built around flash version of at89s52 microcontroller with a non-volatile memory capable of retaining the password data for over ten years. Programs are developed in embedded c using ride compiler. Isp is used to dump the code into the microcontroller SOFTWARE: Embedded 'C' RIDE to write code ISP to burn the chip HARDWARE: At89s52 based our own developed board Power Supply Keypad Control Unit LCD