Design and development of low-range frequency modulated signal (F.M.) transmitter

BIBECHANA ◽

10.3126/bibechana.v15i0.18279 ◽

2017 ◽

Vol 15 ◽

pp. 30-36

Author(s):

Abhishek Shrivastava

Keyword(s):

Short Range ◽

Circuit Diagram ◽

Electronic Components ◽

Design And Development ◽

Human Voice ◽

Small Device ◽

Favorable Conditions

Frequency Modulated (FM) signal transmitter is a small device that can transmit Frequency Modulated signal over short range. [1] This document consists of most simple and economical technique for building a FM transmitter using basic electronic components like resistor, capacitor, inductor etc. The FM transmitter receives human voice signals though microphone. It further amplifies it, modulate it over carrier and finally transmit it. Assuming favorable conditions, output of transmitter can be received by anyone who tunes it in frequency of our transmitter. Here, I have described Circuit diagram, its working, components required, uses of various components in our circuit, its practical applicability. The design is simulated using NI Multisim and is further implemented on bread-board. This design is capable of transmitting signal for distance of radius 20m, tuned at 97.1 MHz One could clearly hear sound produced at microphone of transmitter.BIBECHANA 15 (2018) 30-36

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Design and Development of an Ultra-wideband Millimetre-Wave Antenna for Short-Range High-Speed Communication

Lecture Notes in Electrical Engineering - Proceedings of International Conference on Communication, Circuits, and Systems ◽

10.1007/978-981-33-4866-0_20 ◽

2021 ◽

pp. 157-162

Author(s):

Debraj Dhang ◽

Satyadeep Das ◽

Sudhakar Sahu

Keyword(s):

High Speed ◽

Short Range ◽

Ultra Wideband ◽

Design And Development ◽

Millimetre Wave ◽

Wave Antenna

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On the Development of a Manipulator Type Parallelogram 3-DOF for the Optimization Trajectory

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.572.417 ◽

2013 ◽

Vol 572 ◽

pp. 417-420

Author(s):

Víctor Hugo López Enríquez ◽

Vignaud Granados Alejo ◽

Roberto Martín Del Campo Vázquez ◽

Francisco Javier Santander Bastida

Keyword(s):

Equations Of Motion ◽

Path Tracking ◽

Open Architecture ◽

Control Algorithms ◽

Electronic Components ◽

Lagrange Equations ◽

Design And Development ◽

Optimum Performance ◽

Design And Manufacturing ◽

Dynamics Models

This article presents the main aspects of modeling, design and development of a manipulator type parallelogram 3-DOF for the control of path tracking with open architecture, this model allow easy maintenance and program modification. The design and manufacturing tasks was aided by CAD/CAE/CAM technology. The assembly and commissioning was carried out by the integration of the mechanical and electronic components. The integration and evaluation of the control algorithms during the prototype manipulation was obtained by the kinematic and dynamics models and Lagrange equations of motion. Finally, results of monitoring control paths are present through testing in the joint and cartesian spaces, the results showed the optimum performance of the manipulator under different parameters of control.

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Small Device for Short-Range Antenna Measurements Using Optics

IEEE Antennas and Propagation Magazine ◽

10.1109/map.2011.6157732 ◽

2011 ◽

Vol 53 (6) ◽

pp. 148-152 ◽

Cited By ~ 3

Author(s):

Boyan Yanakiev ◽

Jesper Odum Nielsen ◽

Morten Christensen ◽

Gert Frolund Pedersen

Keyword(s):

Short Range ◽

Antenna Measurements ◽

Small Device

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Automated Chair Design for an Excavator Machine

European Journal of Engineering and Technology Research ◽

10.24018/ejers.2021.6.3.2389 ◽

2021 ◽

Vol 6 (3) ◽

pp. 48-52

Author(s):

Roshan Gangadhar Chavan

Keyword(s):

Real Life ◽

Hydraulic Cylinder ◽

Circuit Diagram ◽

Horizontal Position ◽

Electronic Components ◽

Centre Of Gravity ◽

Flow Pressure ◽

Grinding Machine ◽

Chair Design ◽

Working Parameter

The design & development of automated chair is done in the project for the Excavator machine to ensure the comfort of the rider ensured for any angle of work being carried out by the excavator. The various components like the chair, support rod, rod end eye bearing, the control valves for the flow, pressure and direction, hose pipe and hydraulic cylinder are used to make the model of the automatic chair. The various electronic components like the proximity sensors, relays and SMPS are utilized to control and regulate the incline and decline of the chair as per the machine’s inclination so that horizontal position of the chair can be attained. The part designing and the assembly of all components are conducted in CATIA software. The circuit diagram for the proximity sensor is also made. The model is fabricated using the tools and equipment like the gas cutter, grinding machine, bending machine etc. The prepared model is tested for the incline and decline of the chair at 20˚ angle using the real-life working parameter of the machine. From the test the chair is observed to properly attain the horizontal position along with actuation of hydraulic cylinder by making sure that operator’s centre of gravity is maintained to ensure the comfort of rider.

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Mars: was There an Ancient Eden?

International Astronomical Union Colloquium ◽

10.1017/s025292110001472x ◽

1997 ◽

Vol 161 ◽

pp. 203-218 ◽

Cited By ~ 3

Author(s):

Tobias C. Owen

Keyword(s):

Positive Answer ◽

Biogenic Elements ◽

Habitable Zones ◽

The Face ◽

The Origin Of Life ◽

Early Mars ◽

Favorable Conditions ◽

Open Question ◽

Rocky Planets ◽

Impact Erosion

AbstractThe clear evidence of water erosion on the surface of Mars suggests an early climate much more clement than the present one. Using a model for the origin of inner planet atmospheres by icy planetesimal impact, it is possible to reconstruct the original volatile inventory on Mars, starting from the thin atmosphere we observe today. Evidence for cometary impact can be found in the present abundances and isotope ratios of gases in the atmosphere and in SNC meteorites. If we invoke impact erosion to account for the present excess of129Xe, we predict an early inventory equivalent to at least 7.5 bars of CO2. This reservoir of volatiles is adequate to produce a substantial greenhouse effect, provided there is some small addition of SO2(volcanoes) or reduced gases (cometary impact). Thus it seems likely that conditions on early Mars were suitable for the origin of life – biogenic elements and liquid water were present at favorable conditions of pressure and temperature. Whether life began on Mars remains an open question, receiving hints of a positive answer from recent work on one of the Martian meteorites. The implications for habitable zones around other stars include the need to have rocky planets with sufficient mass to preserve atmospheres in the face of intensive early bombardment.

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Domain coarsening by grain boundary migration in ordered Ni4Mo

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100144279 ◽

1986 ◽

Vol 44 ◽

pp. 560-561

Author(s):

K. Vasudevan ◽

H. P. Kao ◽

C. R. Brooks ◽

E. E. Stansbury

Keyword(s):

Grain Boundary ◽

Grain Boundaries ◽

Short Range ◽

Boundary Migration ◽

Grain Boundary Migration ◽

Rapid Cooling ◽

Temperature Range ◽

Fee Structure ◽

Domain Coarsening ◽

Boundary Reaction

The Ni4Mo alloy has a short-range ordered fee structure (α) above 868°C, but transforms below this temperature to an ordered bet structure (β) by rearrangement of atoms on the fee lattice. The disordered α, retained by rapid cooling, can be ordered by appropriate aging below 868°C. Initially, very fine β domains in six different but crystallographically related variants form and grow in size on further aging. However, in the temperature range 600-775°C, a coarsening reaction begins at the former α grain boundaries and the alloy also coarsens by this mechanism. The purpose of this paper is to report on TEM observations showing the characteristics of this grain boundary reaction.

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Ordering in Ni4Mo by TEM and APFIM

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s042482010012597x ◽

1987 ◽

Vol 45 ◽

pp. 214-215

Author(s):

E.A. Kenik ◽

T.A. Zagula ◽

M.K. Miller ◽

J. Bentley

Keyword(s):

Electron Irradiation ◽

Low Temperatures ◽

Short Range ◽

Atom Probe ◽

Range Order ◽

Considerable Time ◽

Probe Field ◽

Disordered Phase ◽

Transmission Electron ◽

Diffraction Patterns

The state of long-range order (LRO) and short-range order (SRO) in Ni4Mo has been a topic of interest for a considerable time (see Brooks et al.). The SRO is often referred to as 1½0 order from the apparent position of the diffuse maxima in diffraction patterns, which differs from the positions of the LRO (D1a) structure. Various studies have shown that a fully disordered state cannot be retained by quenching, as the atomic arrangements responsible for the 1½0 maxima are present at temperatures above the critical ordering temperature for LRO. Over 20 studies have attempted to identify the atomic arrangements associated with this state of order. A variety of models have been proposed, but no consensus has been reached. It has also been shown that 1 MeV electron irradiation at low temperatures (∼100 K) can produce the disordered phase in Ni4Mo. Transmission electron microscopy (TEM), atom probe field ion microscopy (APFIM), and electron irradiation disordering have been applied in the current study to further the understanding of the ordering processes in Ni4Mo.

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