mobile phone jammer is installed in the hallway of every floor

 mobile phone jammer is installed in the hallway of every floor.
Sun at age 16 moved to the United States, California, and the learning of the University of California at Berkeley, majoring in Economics. School, where he invented a pocket translator, and applied for a patent, after the price of one million U.S. dollars, to sell translator Sharp company. Later created the Unison, the company is now for all Kyocera. Sun back to the Japanese banking software company, founded in 1981, the goal is to popularize computer knowledge to the Japanese. Early development of the Internet, Sun to his unique vision and courage to invest a large number of successful Internet startups including Yhaoo, ETrade, Softbank deservedly stood in the forefront of the Internet revolution. Source: to Pconline keep abreast 0 mobile phone to see news in 2001, Softbank opening of the Yahoo. BB business broadband ADSL services to subscribers in Japan. Moreover, installation of intelligent management system of school mobile phone jammer doesn’t shield the cell phone signal all day.Existing Industrial Park, 13, 30 overseas factories and manufacturing base, and eight overseas design center, 58800, marketing outlets. Huawei - Huawei is one of the global communications industry, a leading supplier of communications equipment R & D, production, marketing and service for customers around the world in the field of telecommunications network equipment to provide innovative, customized, services and solutions to achieve the customers potential for growth, sustained long-term value for our customers. As of October 2005, Huawei in the international market covering over 90 countries and regions in the worlds top 50 operators, 22 the use of Huaweis products and services. It is the examination room shielding of imported mobile phone jammer .
The biggest bright spot of the mobile advertising mobile phones and advertising combine to form a tripartite benefit of customers, businesses and carriers situation. 1.3 Analysis of mobile advertising -2 1.3.1 - Changsha Aeronautical Vocational and Technical College thesis a mobile advertising overall situation of the mobile advertising market analysis with the development of mobile communication technology, the 3G service model continues to become clear, mobile service model derived into innovation The change of phase. With mobile phones, known as the "media" and the term "mobile advertising" began to frequent exposure. U.S. market research firm Visiongains market report said, three years later, the U.S. and European mobile phone advertising market will reach about $ 1 billion. It is the specific school imported mobile phone jammer .
The problems of mobile advertising and defective defective mobile advertising: First, the boycott of mobile phone users on the ad. The current development of mobile advertising, due to the lack of relevant laws and regulations, advertising operators without mobile phone users any license on any advertising, -8 - 3 mobile advertising application and operation of Changsha Aeronautical Vocational and Technical College Thesis mode analysis is commonplace.

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Car Mobile Phone Charger Circuit

Cellphone battery charging process when were done traveling is a big problem. Because when traveling source of power supply is generally difficult to find. If you turn on your phone then the battery continuously over time will run out within a period of five to six hours and eventually mobile phones unusable. Here is described a series of simple charger that will increase battery life two to three hours.

In principle, the charger uses a series of Limited Voltage Current Source. Generally requires cellphone battery voltage 3.6 - 6 volts DC and currents 180-200 mA to perform the charging process. Cellphone battery usually consists of three NiCd battery cells, and each cell has a voltage of 1.2 volts potential. At the speed - average low flows required to charge mobile phone battery about - about 100mA.

In this series there is a 12V voltage source consists of 8 regular battery cells (each cell 1.5 Volt) able to supply current at 1.8 A which is connected with output terminals.

The circuit is also able to monitor the battery voltage level which is in charge. And will automatically cut off the charging process when the output terminal detects a certain battery voltage level predetermined. Timer IC NE555 is used to charge and monitor the voltage level in the battery, Pin 5 (IC1) as the control voltage using a reference voltage zener voltage 5.6Volt. Voltage at Pin 6 as the threshold set by VR1 and the voltage at Pin 2 as the trigger is set by VR2.

When the cellphone battery is connected in series (the Charging Process) applied voltage on PIN2 (IC1) as a trigger would be below the value 1 / 3 Vcc and will cause the Flip-Flop in IC1 will ON and on Pin 3 (IC1) will be high (Cause transistor T1 saturation.). When the battery is full (Full Charge) then the voltage will rise and the voltage on the PIN2 (IC1) will be above the level of trigger point threshold. This will cause the Flip Flop OFF and the output will be low (transistor T1 causes the cutoff) and indirectly also the charging process will stop.

Pin 6 (Threshold IC1) is set at 2 / 3 Vcc by using VR1, transistors T1 which is used to increase the charging current. R3 value is very important to provide the charging current, by setting the value of R3 to 39 ohms then the charging current supplied approximately 180mA. This circuit can be built on any type of PCB (General Purpose PCB) for the calibration process using the DC voltage level cutoff Variable Power Supply. Connect the output terminal circuit with Variable DC Power Supply and set on 7 volts. Adjust VR1 in middle position and slowly adjust VR2 until LED1 OFF, this indicates Low Output. LED1 should turn on when the DC Variable Power Supply voltage is reduced below 5V. LED1 Status flame shown in the table below. Closed circuit with plastic casing and use a suitable connector for connecting to the Battery for Mobile.

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Mobile Charger using Bike Battery

When a surge voltage exceeding maximum voltage rating of the regulator is applied to the input or when a voltage in excess of the input voltage is applied to the output, the regulator will be destroyed. If the input terminal shorts with the ground, the output voltage increases above the input voltage(ground potential)and the charge in the capacitor connected to the output flows into the input side which is also fatal to the regulator.

Both these situations can be avoided by using the Zener at the input and the diode D1 across the regulator. Capacitor C1 and C2 provide stability to the regulator and these should be soldered close to the legs of the regulator. Capacitor C3 act as a buffer to give constant voltage in the output.
7805 IC can tolerate maximum 35 volts and its current rating is 1 Amps maximum. Resistor R1 restricts the charging current to around 330 mA as per the Ohms law.

Even if the current is low, charging process will not be affected. Slow charging with 80 to 100 mA current is generally advised. But in case of an emergency, quick charging can be done with high current Assemble the circuit on a Perf board and enclose in a small case that can be fitted near the Bike battery. Use suitable pins to connect with the Mobile phone. Charging current can be tapped from the battery using Alligator Clips. Before using the circuit, double check the connections especially the polarity of connectors and measure output voltage and current using a Digital Multi Meter. The same circuit can be used for charging Mobile battery from 12 volt Car battery or from a 12 volt Solar panel.

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