ABSTRACT
Hypersonic sound technology from American Technology Corporation employs ultrasonic waves to create audible sound in the air. It works by using harmless ultrasonic tones that we can't hear. These tones use the property of air to create new tones that are within the range of human hearing. The result is audible sound. The acoustical sound wave is created directly in the air molecules by down-converting ultrasonic energy to the frequency spectrum we can hear. Hyper Sonic Sound is produced without the excess bag ....etc

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ABSTRACT
Audio-Video mixing is an important aspect of cinematography.Most videos such as movies and sitcoms have several segments devoid of any speech.Adding carefully chosen music to such segments conveys emotions such as joy,tension or melancholy. In a typically professional video production,skilled audio-mixing artists aesthetically add appropriate audio to the given video shot. This process is tedious, time-consuming and expensive.
The PIVOT VECTOR SPACE APPROACH in audio mixing is a novel technique that automatical ....etc

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Security System Using VHDL
Project Members
Amal Shanavas
Aneez I
Ijas Rahim
Renjith S Menon
Sajid S Chavady


Introduction to VHDL
VHDL-abbreviation of Very high speed integrated circuit Hardware Description Language
VHDL resulted from the work done in the ˜70s and early ˜80s by the U.S Department of Defense.
In 1986,VHDL was proposed as an IEEE standard
Its roots are in the ADA language



Why Use VHDL
Semiconductor devices dimensions have shrunk
Reduces ....etc

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1. VERSATILE AUTO CUT OFF UNIT
2. IC 555 AS ANALOG SWITCH FOR POSITIVE SIGNALS
3. DANCING LIGHTS / SOUND LEVEL INDICATOR
4. BATERY LEVEL INDICATOR
5. AUTOMATIC BATTERY SWITCHING FOR DIGITAL CLOCKS
6. CARRIER FAILURE INDICATOR
7. CRYSTAL CONTROLLED INVERTER
8. Communicating to 89S52 MCU through windows hyper terminal using RS-232
9. MANUAL VOLTAGE STABILIZER TO AN AUTOMATIC STABILIZER
10. IC FUZZ FOR GUITAR
11. MUSICAL DOOR BELL
12. PC based substation monitoring
13. VARIABLE SWITCHING POWER SUPPLY
14. Q MASTER FOR JAM SESSION
15. ....etc

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DIGITAL AUDIO PROCESSOR USING AT89C51
1. BACKGROUND
This report presents an infrared (IR) remote-controlled digital audio processor.
It is based on a microcontroller and can be used with any NEC-compatible full function
IR remote-control. This audio processor has enhanced features and can be easily customized to meet individual requirements as it is programmable.
Its main features are:
1. Full remote control using any NEC-compatible IR remote control handset.
2. Provision for four stereo input chann ....etc

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1.Lead Acid Battery Charger
2.Simple 78xx Current Booster
3.Simple Touch Switch
4.Two way Simple Small Telephone Exchange
5.Open GPS Tracker
6.USB Sound Card with PCM2702
7.PCB Exposure Box with countdown system
8.MCU controlled Bluetooth automation with IR Automatic Fan Controller
9.Low cost / Automatic Emergency Light
10.Simple FM Transmitter
11.230V Blinking LED
12.2500W Phase Control
13.MAX6953 Development board
14.IR Digital Thermostat for FAN
15.Simple Crystal Tester
16.12V Relay on 6V power supply
17.Transistor tester
....etc

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ABSTRACT
UWB is a wireless technology that transmits binary data”the 0s and 1s that are the digital building blocks of modern information systems. It uses low-energy and extremely short duration (in the order of pico seconds) impulses or bursts of RF (radio frequency) energy over a wide spectrum of frequencies, to transmit data over short to medium distances, say about 15”100 m. It doesn™t use carrier wave to transmit data.
Current radio technology - picture a guy watering his lawn with a garden hose
an ....etc

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MSK Direct Sequence Spread Spectrum System Incorporating SAW Tapped Delay Line and SAW Shaping Filter
Abstract
The present work deals with theIF section of an indoor wireless TDMA/CDMA(TCDMA) communication system operating inthe 2.45 GHz ISM band . Spreading anddespreading is done at the 361 MHz IF withan extremely wide bandwidth of 65 MHz whichis greater than the coherence bandwidth of theUHF indoor radio channel. For the modulationof the data we employ on o_ keying (OOK), andfor the spreading minimum shift keying (MSK).Two ty ....etc

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full seminar and abstract for sun tracker ....etc

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INTRODUCTION:
AMPLIFIER:
A circuit that increases the amplitude of a given input signal is called an amplifier. A small a.c. signal fed to the amplifier is obtained as a larger a.c. signal of the same frequency at the output.Amplifiers constitute an essential part of radio, television and other communication circuits. Bipolar junction transistors and Field effect transistors are commonly used as amplifying elements.
Amplifiers can be classified as follows:
1. Based on transistor conf ....etc

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