IOSR-JAP   Volume-2 ~ Issue-2 ~ Sep–Oct 2012

Paper Type	:	Research Paper
Title	:	Design and Development of Instant Power Supply
Country	:	Bangladesh
Authors	:	Ashraf Mehbub, Humayun Kabir, Jahirul Islam Khandaker, Md. Abdul Mannan Chowdhury
	:	10.9790/4861-0220104

Abstract: Instant Power Supply unit (IPS) is an electrical device that provides power when the main supply fails to operate. In the present work an attempt has been made to design and develop an instant power supply unit at the electronics laboratory of department of Physics, Jahangirnagar University. In the present circuit active and passive devices, such as diodes, transistors, capacitors, resistors etc have been used. Two transformers (One Step up and one step down) have also been used in this work. A voltage regulator (LM 338K) is used in the charger circuit so that the battery will be charged properly and will not be over charged. As a result the battery will get long life. Also the output of the device will be automatically stable. A relay circuit has been incorporated so that when the main supply is present the battery will automatically be charged and not provide any output. The main supply would come to the output of the IPS through the relay circuit. The designed circuit is operated successfully and the results obtained are satisfactory.

[1]. http://www.powercombd.com/products/72-instant-power-supply-ips.
[2]. http://en.wikipedia.org/wiki/Transformer.
[3]. http://en.wikipedia.org/wiki/Battery_%28electricity%29.
[4]. http://en.wikipedia.org/wiki/Electronic_oscillator.
[5]. Ramakant A. Gayakward, "Op-Amp and Linear Integrated Circuits" 4th edition, Pearson Education. P-279.
[6]. Rezaul Karim Mazumder, "Principles of Electronic Circuit" Banglabazar, Dhaka. P- 469.
[7]. http://www.toolingu.com/definition-460310-34129-power-circuit.html.

Paper Type	:	Research Paper
Title	:	Automation Technique for the Plunger in Liquid Cell of X-Band Microwave Bench Using Stepper Motor
Country	:	India
Authors	:	S. S. Nalwad , S. V. Vedpathak , Dr. K. U. Gore
	:	10.9790/4861-0220508

Abstract:Automation is the use of Computer controlled stepper motors. It is one of the most versatile forms of positioning systems. Generally dielectric parameters of different polar liquids, binary mixture of polar liquid with non polar liquid in different mole fraction or weight fraction are measured by using X-band Microwave bench manually. The measurements done manually are not much accurate and exact. Hence, personal computer (PC)based automatic measurement technique is used for accurate measurement of the dielectric parameters. PC based stepper motor moves the plunger in liquid cell of microwave bench & measures the distance up to fraction of mm to nanometer per step. This technique is used to give the maximum accuracy for the measurement of 𝜆𝑑. Further accuracy of this technique can be increased when the stepper motor is operated in micro stepping mode.
Keywords: Driver, Microcontroller, PC, Stepper motor, X-band Microwave bench

Journal Papers:
[1] Mandeep Singh, Rekha & Balwinder Singh International Journal of computer science & communication Vol. 1, No. 1, January-
June 2010, pp. 189-191
[2] R.H. Amenerkar, C.S. Adgaonkar, S.S. Yawale and S.P. Yawale, "Microwave properties of vanadium borate glasses",
Material Science., 25, No. 5, October 2002, pp 431-434.
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[6] Von Hippel"Dielectric materials and applications", John and Sons New York, 1954, pp 104-115..
[7] Duglas V .Hall. "Microprocessor Interfacing and Programming".McGraw-Hill.1998
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[10] B. Govindarajalu: IBM PC and Clones: Hardware, Troubleshooting and Maintenance,TMH, New Delhi, Ch. 3, pp. 63-102
(1998).

Paper Type	:	Research Paper
Title	:	Arising From a Published Source Beam, Magnetic and Gravitational Fields Other Than Particle Passes Etc... Then The Beam Is Converted Into a Magnetic Beam
Country	:	India
Authors	:	Vikrant
	:	10.9790/4861-0220914

Abstract: Light interference, diffraction and polarisatrion events etc, based on the successful delivery of the light wave can be represented nature. Other events, such as some of the light - the Photoelecticlight effect, Compton effect and the Raman effect etc, to reflect such events require Einstein quantum theory. Which acts as particles of light called a photon. Accordingly, acts like a particle beam to see if the publish. If a published ray source (E.g. - bulbs, sun, etc.) occurs, then the beam in the presence of atmospheric molecules, microscopic molecule, particle and planet etc, comes into contact changes its nature and properties.And other properties of the beam starts to appear, it seems to behave like a magnetic beam.

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