Smart Phone Light / Azsrul Azswan Abd. Wahid and Muhammad Ekhram Abdullah

Abd. Wahid, Azsrul Azswan Abd. Wahid and Abdullah, Muhammad Ekhram Abdullah (2005) Smart Phone Light / Azsrul Azswan Abd. Wahid and Muhammad Ekhram Abdullah. [Student Project] (Unpublished)

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Abstract

The word 'telephone' comes from word 'tele' which means far and word 'phone' which means sound. So, telephony involves the conversion of sound signals into audio frequency analog electrical signal, which can then be transmitted over an electric transmission system and then recovered to sound signal at the receiver end. The electric signals may be transmitted by radio or transmission line through a telephone networks. This network is referred to as Public Switching Telephone Network (PSTN). So, in our project we finally choose to implement one system which give more helpful to people. We called our project is "Smart Phone Light". The first part of our circuit is ring detector. To realize it, we use an opto-coupler transistor (MCT2E)/ (MCT2) as our ring detector. We also used IC 74LS123 in this circuit. The 74LS123 re trigger able mono stable multi vibrator is used to generate a programmable pulse-width. The first mono stable 74LSI23(A) generates a pulse from the trigger input available during ringing The circuit provides automatic switching on of a lamp during darkness. The lamp can be battery powered to provide light during power failure or load shedding. This avoids delay in attending to a call. The light switches off automatically after a programmable time period and it needs no attention at all

Metadata

Item Type: Student Project
Creators:
Creators
Email
Abd. Wahid, Azsrul Azswan Abd. Wahid
2001361673
Abdullah, Muhammad Ekhram Abdullah
2001139375
Contributors:
Contribution
Name
Email / ID Num.
Thesis advisor
Hamzah, Irni Hamiza
UNSPECIFIED
Subjects: T Technology > TK Electrical engineering. Electronics. Nuclear engineering > Telecommunication
T Technology > TK Electrical engineering. Electronics. Nuclear engineering > Telecommunication > Wireless communication systems. Mobile communication systems. Access control
T Technology > TK Electrical engineering. Electronics. Nuclear engineering > Telecommunication > Wireless communication systems. Mobile communication systems. Access control > Orthogonal frequency division multiplexing
Divisions: Universiti Teknologi MARA, Pulau Pinang > Permatang Pauh Campus > Faculty of Electrical Engineering
Programme: Diploma of Electrical Engineering
Item ID: 47298
Uncontrolled Keywords: Telephone, Smart Phone Light, Battery
URI: https://ir.uitm.edu.my/id/eprint/47298

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