Introduction:

This project is developed for a better authentication method than just a password for access to critical information. If one wants to set up a more secure environment for your employees and assets. For higher security – fingerprint recognition technique is implemented for authentication. Fingerprint recognition provides a great solution for the purpose of only the authenticated person can able to operate the devices to avoid the unauthorized persons access. Fingerprint recognition provides a low cost biometrics solution and with its small designs makes it a prime choice when setting up a high security solution. The output from the printer port is given to a buffer and then to a current driver, which drives the relay, the parallel port and the buffer is interfaced via a opto-coupler circuit the output from the relay is used to drive the devices.

Theory of operation:

 This project utilizes to provide higher-end security for device control. Here the project allows limited persons to turns ON/OFF the device. The permitted persons fingerprints are stored in a memory primarily. Then the person who wants to turns ON/OFF the device should touch the fingerprint sensors; here the program (visual basic) written for the processing will compare the fingerprints of the person with previously stored fingerprints. If these are equal then the computer sends the control signal through the parallel port to microcontroller 89c51. Here the microcontroller checks the control signal status and sends the signal to the device controlled relays. The device-controlled relays are connects the devices with power supply.