Indexing

Abstract:This research paper strictly focused on the use of a biometric fingerprint sensor in creating a security platform door lock. The system utilized a regulated 12v power supply from a 220volt alternative current , a relay control unit was incorporated which served as a switch in controlling the door lock system. A PIC168F77A microcontroller was connected to the transistor that regulated the relay control unit. The system was made up of a fingerprint sensor which sensed fingerprint input that was digitally interpreted and analyzed by a microcontroller unit. This microcontroller unit interpreted the input data fed into it by the fingerprint sensor and determined the opening and closing of the magnetic lock. This developed system performed as expected and the response time of the microcontroller unit was prompt, reliable, secured and accurate.

Keywords:Microcontroller, Magnetic Lock, Fingerprint Sensor, Relay Control Unit.
Title:DEVELOPMENT AND EXPERIMENTATION OF A SECURITY DOOR LOCK SYSTEM USING BIOMETRIC FINGERPRINT ARCHITECTURE
Author:M. I. Efunbote, M.B. Adeleke, O. Fagbemi, O. A. Orelaja, R.A. Jokojeje
ISSN 2349-7815
International Journal of Recent Research in Electrical and Electronics Engineering (IJRREEE)
Paper Publications

Abstract:This research work highlighted major components of an FM transmitter consisting of audio unit, modulating unit, amplifier unit, RF(Radio Frequency) amplifier unit and transmitting unit. These units worked together to achieve the desired results. The transmitter itself generated alternating current, which was applied to the antenna when excited by this alternating current, basically a VHF colpitt oscillator capable of transmitting sound to any standard FM receiver. The circuit worked on a DC source which was got from rectification. This was made use of  by the FM (Frequency Modulation ) transmitter and a capacitor microphone which picked up a very weak signal. The electrical signal was then applied to FM (Frequency Module) transmitter where the signal was then frequency modulated with a carrier frequency. The modulated signal was then transmitted to the medium through a transmitting antenna. FM transmitter could be used as cordless microphone, mobile phones and public address purpose. The antenna was attached to the transmitter in a portable device such as cell phone and walkie talkie, the antenna might be located on top of a building or a separate tower and connected to the transmitter by a feed line, that is transmitting line.

Keywords:Transmitter, Radio Frequency, Modulation, Receiver and Antenna.
Title:DESIGN AND CONSTRUCTION OF FM TRANSMITER WITH THE RANGE OF 1.5KM
Author:M. I. Efunbote, T. I. Ibrahim, J. O. Otulana, R. A. Jokojeje
ISSN 2349-7815
International Journal of Recent Research in Electrical and Electronics Engineering (IJRREEE)
Paper Publications