Abstract:
This work involves the design and development of a digital signal detector which is
capable of detecting incoming and outgoing signals from mobile phones. The presence
of an activated mobile phone can be detected by this handy, pocket-size mobile signal
detector from a distance of one and a half meters, which could be used in preventing the
use of mobile phones in examination halls, classrooms, confidential rooms etc. The circuit
can detect the incoming and outgoing calls, text messages, and video transmission even
if the mobile is kept in the silent mode. The moment the gadget detects Radio Frequency
(RF) transmission signal from an activated mobile phone, it starts sounding a beep alarm
and the Light Emitting Diode (LED) blinks. The alarm continues until the signal
transmission ceases. The circuit is assembled on a general purpose PCB as compact as
possible.
The completed design circuit is analyzed using a multsm software, oscilloscope and
multimeter to measure the output voltages across various components when there is or
no signal. The results obtained shows how efficient this device can serve the purpose of
which it was designed. Officials from West African Examination Council (WAEC) will
benefit from the study, since it has been their ambition to stop examination malpractices
in Ghana. The study will add up knowledge, both theoretical and practical aspect of
electrical and electronic students.
Description:
A project submitted to the Department of Electrical/Electronic
Engineering, University of Education, Winneba in partial
fulfillment of the requirements for the degree of
MASTER OF TECHNOLOGY
Faculty of Technology.
