BLOCK DIAGRAM DESCRIPTION

Input section:-

Input section of this system consists of Matrix key board & RFID Card.

Matrix key board:-

                          Matrix key board is used to enter the password. In this project we use the                                    4*3 keyboard. The matrix key board is connected to port2 of microcontroller.

RFID Card:-

RFID Card is used as a user’s identity. To store data in RFID Card the IC240c04 is used.

Controller:-

                         We use the 89s52microcontroller.

Display section:-

                         This section consists of LCD & computer. 

LCD:-

                         LCD is used to show the project name & the process status to the user. LCD is connected to the port0 of microcontroller 89s52.

Computer:-

                        Computer is used to show the VB Window to the operator. This VB window shows in time, out time, attendance, salary, & all information about the user.

RS232 interface:-

                         RS232 is used to make communication between computer (for VB software) & project hardware.