Adaptive Photonic Phase Locked Elements Documentation ....etc

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To get full information or details of microcontroller based ultrasonic motion detector please have a look on the pages

http://seminarsprojects.net/Thread-ultrasonic-motion-detector-schematic?pid=17410&mode=threaded

http://seminarsprojects.net/Thread-the-ultrasound-motion-detection-sensor

http://seminarsprojects.net/Thread-ultrasonic-motion-detector-schematic?pid=17410&mode=threaded

http://seminarsprojects.net/Thread-ultrasonic-motion-detector

http://seminarsprojects.net/Thread-ultrasonic-movement-detector?pid=45648&mode=threaded

if you a ....etc

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An overview of the phase-locked loop (PLL)



INTRODUCTION
The basic phase-locked loop (PLL) concept has been known and
widely utilized since first being proposed in 1922. Since that time,
PLLs have been used in instrumentation, space telemetry, and many
other applications requiring a high degree of noise immunity and
narrow bandwidth. Techniques and systems involved in these
applications frequently are quite complex, requiring a high degree of
sophistication. Many of the PLL ....etc

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automatic locked control system of vehicle drunken driving based on pic16f877a pdf

ABSTRACT

Aiming at causing frequency traffic accidents by the drunken driving, the paper puts forward an automatic locked control system of vehicle drunken driving as a smart solution to prevent the phenomenon. And designs a automatic locked control system based on PIC16F877A . The system hardware modules and software system are elaborated in detailed. At last through the experiment, it verifies that the automatic control system has reached requirement. ....etc

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The ultrasonic detector is a popular device for detecting motion in a free space. it is not as versatile as the passive infra-red type mainly due to its restricted range, usually only about 9 meters max. It can be used in situations and environments which mould be unsuitable for the infra-red type as it is not affected by temperature chances.The human ear can hear sounds of frequencies between 20Hz and 20KHz (20,000Hz). Sound waves do exist above 20KHz but me cannot hear them, these very high sounds are called ultrasounds or ultrasonics. Imagin ....etc

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To get full information or details of ultrasonic motion detector please have a look on the pages

http://seminarsprojects.net/Thread-the-ultrasound-motion-detection-sensor

http://seminarsprojects.net/Thread-ultrasonic-motion-detector-schematic?pid=17410&mode=threaded

http://seminarsprojects.net/Thread-ultrasonic-motion-detector

http://seminarsprojects.net/Thread-ultrasonic-movement-detector?pid=45648&mode=threaded

if you again feel trouble on ultrasonic motion detector please reply in that page and ask specific fields in ultrasonic motion ....etc

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Ultrasonic motion detectors emit and receive ultrasonic sound energy in a region of interest.Object motion within the region of interest and in the range of the ultrasonic motion sensor is detected and an alarm signal is produced.The range of these detectors differs from the designed range whenever the actual atmospheric sound propogation conditions vary from the atmospheric conditions assumed in the design .Ultrasonic motion detectors are commonly used for automatic door openers and security alarms. ultrasonic beams are easily blocked by th ....etc

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http://seminarsprojects.net/Thread-the-ultrasound-motion-detection-sensor ....etc

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INTRODUCTION
A PLL circuit is used to synchronize an output signal, which is usually generated by an oscillator, with a reference or input signal in frequency as well as in phase. In the synchronized state, the difference (error) between the reference and the oscillator output is zero or at least very small. So it is called locked
The phase-lock-loop (PLL) is commonly used in microprocessors to generate a clock at high frequency ( F out = 2GHz for example) from an external clock at low frequency ( F ref = 100MHz f ....etc

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