Showing posts with label mobile. Show all posts
Showing posts with label mobile. Show all posts
A cinema installed mobile phone jammers
The newest Mobile Phone jammers make use of the 6 channel design which has solved the problems of signal unsteady or short amplifier distance, etc.
I want you to some common problems list in mobile phone jammers and method to solve these problems.Because of the widespread use of mobile phone, we noticed a lot of problems occur in the public, one of which is a noise. To stop the noise, caused by mobile phone, mobile phone jammers are placed in the public domain, theatre and cinema is one of them. Cell phone jammer is not a new thing, in the foreign actors, they used to complain that all mobile phone when watching this program.
Only in 2004, in France, a cinema installed mobile phone jammers, so the audience doesnt ring interrupted while enjoying the great movies from the mobile phone.
In 2007, an old theater, founded in 1756 in Russia decided to install and open mobile phone jammers when the display, because many people will not listen to rule without the use of mobile phone in the opera.The thing is, the theatre, the actors cant stand mobile phone. In the stage: nonsense, let me finish my words! It is very expensive to use the best 4g cell phone jammer in the theater, at that time, but all of a sudden stop interference to the actor, theater to spend so much money.According to the audience, because blockade of the wifi cell phone jammers for sale, the entire concert is really very quiet, no mobile phone ring tones in all. People in the enjoyment of opera, but many people are about people may try to contact them for some unexpected events.
A lot of people think it would be better if the theater, tell them about the use of mobile phone jammers, so they can make some arrangements with their friends and family. Most of the audience that the mobile phone jammers is really necessary in some high class of this concert.
But it did theater really use high-power radio interference when the display? Reporter talked about this a charger. He said they have built many devices in the beginning of the opera, mobile phone will have a great influence, so they use their mobile phone and portable cell phone jammers for sale stop the audience would not stop using their mobile phone."We just found no mobile phone signal, they are blocked?" recently, the audience will find a theater in Changzhou, when they are watching classical opera. Theres something to tell us, portable cell phone jammer 3g sale best will be open in some places like theaters and concert once a program to determine the quiet.
Read Full article[...]
I want you to some common problems list in mobile phone jammers and method to solve these problems.Because of the widespread use of mobile phone, we noticed a lot of problems occur in the public, one of which is a noise. To stop the noise, caused by mobile phone, mobile phone jammers are placed in the public domain, theatre and cinema is one of them. Cell phone jammer is not a new thing, in the foreign actors, they used to complain that all mobile phone when watching this program.
Only in 2004, in France, a cinema installed mobile phone jammers, so the audience doesnt ring interrupted while enjoying the great movies from the mobile phone.
In 2007, an old theater, founded in 1756 in Russia decided to install and open mobile phone jammers when the display, because many people will not listen to rule without the use of mobile phone in the opera.The thing is, the theatre, the actors cant stand mobile phone. In the stage: nonsense, let me finish my words! It is very expensive to use the best 4g cell phone jammer in the theater, at that time, but all of a sudden stop interference to the actor, theater to spend so much money.According to the audience, because blockade of the wifi cell phone jammers for sale, the entire concert is really very quiet, no mobile phone ring tones in all. People in the enjoyment of opera, but many people are about people may try to contact them for some unexpected events.
A lot of people think it would be better if the theater, tell them about the use of mobile phone jammers, so they can make some arrangements with their friends and family. Most of the audience that the mobile phone jammers is really necessary in some high class of this concert.
But it did theater really use high-power radio interference when the display? Reporter talked about this a charger. He said they have built many devices in the beginning of the opera, mobile phone will have a great influence, so they use their mobile phone and portable cell phone jammers for sale stop the audience would not stop using their mobile phone."We just found no mobile phone signal, they are blocked?" recently, the audience will find a theater in Changzhou, when they are watching classical opera. Theres something to tell us, portable cell phone jammer 3g sale best will be open in some places like theaters and concert once a program to determine the quiet.
Mobile Cellphone Battery Charger Circuit
Charging of the mobile phone, cellphone battery is a big problem while traveling as power supply source is not generally accessible. If you keep your cellphone switched on continuously, its battery will go flat within five to six hours, making the cellphone useless.
Parts
A fully charged battery becomes necessary especially when your distance from the nearest relay station increases. Here’s a simple charger that replenishes the cellphone battery within two to three hours. Basically, the charger is a current-limited voltage source. Generally, cellphone battery packs require 3.6-6V DC and 180-200mA current for charging. These usually contain three NiCd cells, each having 1.2V rating.
Current of 100mA is sufficient for charging the cellphone battery at a slow rate. A 12V battery containing eight pen cells gives sufficient current (1.8A) to charge the battery connected across the output terminals. The circuit also monitors the voltage level of the battery. It automatically cuts off the charging process when its output terminal voltage increases above the predetermined voltage level.
Circuit Diagram:Parts
- P1 = 20K
- P2 = 20K
- R1 = 390R
- R2 = 680R
- R3 = 39R-1W
- R4 = 27K
- R5 = 47K
- R6 = 3.3K
- R7 = 100R-1W
- C1 = 4.7uF-25V
- C2 = 0.01uF
- C3 = 0.001uF
- D1 = 5.6V-1W Zener
- D2 = 3mm. Red LED
- Q1 = SL100
- S1 = On/Off Switch
- B1 = 1.5vx8 AA Cells in Series
- IC1 = NE555 Timer IC
Timer IC NE555 is used to charge and monitor the voltage level in the battery. Control voltage pin 5 of IC1 is provided with a reference voltage of 5.6V by zener diode D1. Threshold pin 6 is supplied with a voltage set by P1 and trigger pin 2 is supplied with a voltage set by P2. When the discharged cellphone battery is connected to the circuit, the voltage given to trigger pin 2 of IC1 is below 1/3Vcc and hence the flip-flop in the IC is switched on to take output pin 3 high. When the battery is fully charged, the output terminal voltage increases the voltage at pin 2 of IC1 above the trigger point threshold.
This switches off the flip-flop and the output goes low to terminate the charging process. Threshold pin 6 of IC1 is referenced at 2/3Vcc set by P1. Transistor Q1 is used to enhance the charging current. Value of R3 is critical in providing the required current for charging. With the given value of 39-ohm the charging current is around 180 mA. The circuit can be constructed on a small general-purpose PCB.
For calibration of cut-off voltage level, use a variable DC power source. Connect the output terminals of the circuit to the variable power supply set at 7V. Adjust P1 in the middle position and slowly adjust P2 until LED (D2) goes off, indicating low output. LED should turn on when the voltage of the variable power supply reduces below 5V. Enclose the circuit in a small plastic case and use suitable connector for connecting to the cellphone battery.
Subscribe to:
Posts (Atom)