Bluetooth Based Smart Sensor Networks ECE Seminar Report

Introduction to Bluetooth Based Smart Sensor Networks Seminar Topic:

Now a day’s the Bluetooth device has become and generates a great importance in the daily needs of the people’s. The users require Bluetooth after each and every successful work to transfer the data or to communicate with the other person totally free and with less cost too. The communication strengths of the device is fast, never down, The paths of the delivering information is automatic as it’s the device related to the future applications and devices. These entire systems are allocated to work on the sensors and the controllers are controlled and configure by the actuators.

The existing system called the Bluetooth has the operation of system which is completely not under license and is based on the ISM band with the total frequency of 2.4 GHz for the better spreading of the machinery techniques. A normal Bluetooth device only has the range of the 10 meters and it can also be incremented upto 100 meters too.

This standard channel of the Bluetooth device supports a standard bandwidth of approximate 1 Mb/sec. These Bluetooth are combined connected to a single piconet where each piconet has a content of eight Bluetooth devices together. These eight devices have the seven of it as the slave devices and one as the master device of the Bluetooth connection.

This Bluetooth provides a large chance of the sensory networks and architectural plans too. The architecture plans have a section of wireless connections which is even connected with the Bluetooth services also. When a person using the Bluetooth gets into the supported area then the person automatically gets connected with the Bluetooth services wireless only. In future the developers are even trying to increment the use of Bluetooth services for data analysis and also the data concentric system. Many newest products are been launched in the market regarding the Bluetooth services and the system.

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Electrical Seminar Topic on Transformers

Wound magnetic devices are designed to transfer of energy over a wide frequency range. Usually broadband transformers are wound on ferrite rods and threads. This is used in the equipment of Telecomm. Binocular cores and Balun are used for broadband transformers and it must accommodate RF power.

Conventional and transmission-line types are the two kinds of transformers:

The former type allows transformation ratio that we usually need

The latter comes with parallel or twisted wingdings that helps to produce a specific interface of transformations like 16:1 and 4:1 and 9:1.

For determining the Minimum- Number – of – Turns impedance ratio square root is used. The primary resistance is around 5 times the impedance. A resistance of 1000 ohms is allowed with a 200 ohm to 50 ohm transformer and it needs inductance of 88 uh.

Ferrites are used for Balun cores. The core material permeability is usually around 850 to 900. It is designed by placing two thirds of far-right side by side. Quick setting epoxy is used to glue cores together to create separate toroid tubes of two.

Usually frequency based broadband transformers have medium or low level of frequency. Fair-Rite 78 or 77 materials are examples of manganese zinc ferrites and they are very ideal. In order to reduce the Rdc ratio core geometry be used. For a high level of frequency Nicke zinc ferrites are used as the core materials. The band pass lies above 500 kHz.

For active mixer broadband transformers are used as output. For matching an antenna of 50 ohms to a grounded gate an amplifier is used to receive and convert. Two broadband transformers are used in push-pull RF power amplifier.

Transformers can also be created for providing DC isolation. Matching of impedance and specific voltage and current ratios. It provides coverage of 1.8 to 30 MHz and have an efficiency of 90% range.