ppt presentation of wireless battery charger using microwaves rf to dc conversion

Battery life of mobile phone is always been a problem for manufacturers. People are complaining about their mobile s battery life, that they don t have long battery life and they have to charge their phone several times. Portable electronic devices are very popular nowadays. As the usage of these portable electronic devices is increasing, the demands for longer battery life are also increasing. These batteries need to be recharged or replaced periodically. It i ....etc

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Variable DC power supply is one of the projects that each student of the electronics should build. Build your own power supply is fun and use it throughout your building projects is the reward of your success. This project uses a transformer to reduce the incoming AC voltage to 12.5V AC.

This circuit is designed for 240VAC input voltage. If 110VAC is necessary, a power transformer 110 / 12.5 should be used. Buck of AC voltage is then rectified by a diode bridge. The rectified DC voltage is smoothed by means of an electrolytic capacitor 2 200uF ....etc

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To get full information or details of project on battery charger using scr pdf please have a look on the pages

http://seminarsprojects.net/Thread-fabrication-of-an-automatic-battery-charger-using-%E2%80%9Cscr%E2%80%9D

if you again feel trouble on project on battery charger using scr pdf please reply in that page and ask specific fields in project on battery charger using scr pdf ....etc

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battery charger circuit using scr pdf

SCR is abbreviation for Silicon Controlled Rectifier. SCR has three pins anode, cathode and gate as shown in the below figure. It is made up of there PN junction diodes also; it is solid state equivalent of gas filled triode and has around four semi conductor layers. SCR can conduct the current in a single direction or we can say SCR s are unidirectional. The SCR can be triggered only at the gate through the current. SCR will combine the features of rectifier and transistor. They are mainly used in switch ....etc

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A battery charger with maximum power point
tracking function for low-power photovoltaic system applications


Huang-Jen Chiu1, Yu-Kang Lo1, Ting-Peng Lee1, Qing Su Chen1, Wen Long Yu1,
Jian-Xing Lee1, Frank Shih2 and Shann-Chyi Mou3
1Department of Electronic Engineering, National Taiwan University of Science and Technology, Taipei, Taiwan
2Macroblock, Inc., Taiwan
3Department of Mechanical Engineering, Ching-Yun University, Taipei, Taiwan


ABSTRACT
A battery charger with MPPT function for low-power PV system applications ....etc

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lm317 12v battery charger

Automatic Battery Charger Circuit Design:

This automatic battery charger circuit design mainly involves two sections power supply section and load comparison section.

The main supply voltage 230V, 50Hz is connected to the primary winding of the center tapped transformer to step down the voltage to 15-0-15V.

The output of the transformer is connected to the Diodes D1, D2. Here diodes D1, D2 are used to convert low AC voltage to pulsating DC voltage. This process is also called as rectification. The pulsating DC vol ....etc

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its for doing the project.so i need all required things for doing this project. ....etc

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auto turn off battery charger pdf

This is a simple DIY charge controller schematic posted in response to a request by one of our readers on our facebook page. The main component of this auto battery charger circuit is a 555 timer which compares the voltage in the battery. It turns ON the charger if the battery voltage is below the variable preset voltage (12 volt chosen here) and turns OFF the charger if the voltage reaches 13.8 volt. The battery charging voltage of the charger can be varied by adjusting the variable resistor.

Working
Positiv ....etc

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:idea:
please give me auto turn off battery charger project documentation



please urgent sena the auto turn off battery charger project documentation ....etc

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Flywheel energy storage (FES) works by accelerating a rotor (flywheel) to a very high speed and maintaining the energy in the system as rotational energy. When energy is extracted from the system, the flywheel's rotational speed is reduced as a consequence of the principle of conservation of energy; adding energy to the system correspondingly results in an increase in the speed of the flywheel.

Most FES systems use electricity to accelerate and decelerate the flywheel, but devices that directly use mechanical energy are being developed. Sinc ....etc

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