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International Journal of Scientific and Engineering Research
ISSN Online 2229-5518
ISSN Print: 2229-5518 2    
Website: http://www.ijser.org
scirp IJSER >> Volume 3,Issue 2,February 2012
Signal Generator with Graphical User Interface Control using Wireless Sensor Technology
Full Text(PDF, )  PP.124-132  
Keshavamurthy, Dr.Dharmishtan K Varughese, Dr. N.J.R Muniraj
—Dock light, Zigbee, Nanowatt, I2C Mode, Encrypting, Watchdog andGraphical User Interface
In the fields of communications, signal processing, and in Electrical Engineering more generally, a signal is any time-varying or spatial-varying quantity. In the physical world, any quantity measurable through time or over space can be taken as a signal. Within a complex society, any set of human information or machine data can also be taken as a signal. Signal processing is an area of Electrical Engineering and applied Mathematics that deals with operations on or analysis of signals, in either discrete or continuous time to perform useful operations on those signals. Signals of interest can include sound, images, time-varying measurement values and sensor data, for example biological data such as Electrocardiograms, control system signals, telecommunication transmission signals such as radio signals, and many others. Signals are analog or digital electrical representations of time-varying or spatial-varying physical quantities. So we can also realize how important is signal processing .It can not only convert data from one form (analog) to another (digital) and facilitate its communication and other needs but as well vary parameters provided to practical circuits and appliances So with the context to signals we do face certain problems that we aim to solve:(1). We do find ways to share data with other related hardware and at a distance with modern transmission protocols such as I2C and SPI. (2). Conversion of data from analog to digital and vice versa. (3). Varying power or voltage signal applied to an appliance so that we can save power consumption. (4). The development of a unit that can intelligently read the PC's request at one end and vary the data and signals as and when required.
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