Effective shielding range of cell phone signal jammers can be predicted

Effective shielding range of cell phone signal jammers can be predicted.
When the reed switch is damaged, the cell phone is a very complex fault, some or all of the main fault, the power supply is difficult, is not displayed. Start mobile phone maintenance difficulties, key failure, the fault does not show, do not forget to check the reed switch. The role of the Eagle sensors and magnetic reed switch, its working principle is very similar to the magnetic field generated through off. Hawke sensor is an electronic component, and the appearance of the package is very similar transistor, the pin arrangement shown in Figure 2-8. Shown in Figure 2-9, the principle of the structure of the internal. Hawke element, amplifier, Schmitt circuit and open-collector output transistor. Customers must consider blocking range cell phone signal jammers.
When the magnetic field component Hawke generated a slight voltage amplifier and a Schmitt circuit, and outputs a low level when the transistor is turned on; when no magnetic field of the field effect transistor is turned off, the output is high. Reed switch sensor the Hawke life longer, difficult to damage. And vibration, the acceleration is not sensitive. The role of the faster switching time is generally 0.1 to 2 ms, 1 ~ 3ms faster than reed. Ericsson T28 mobile phone applications as a touch switch, this switch electronic components, digital power switch control tube, conduction D600 output microprocessor HALL signal control.
If the resistance is relatively small, and then red, black pen exchange measurements. If the resistance is an N-channel tube, and for black gate electrode G of the contact pins of the original assumptions are correct. Can also distinguish between the P-channel JFET. Metal oxide FET discriminant. Gate G to determining. Rxl00 block multimeter, measuring power FET between any two pins reverse resistance value, the two pins in the first measurement of a few hundred ohms resistance value, when the two table stylus D and S poles, and the other The pin is not connected to the table TG extremely. Inductor work is the use of the principle of electromagnetic induction. When a conductor of current flowing through, and it will generate around the wires of the electromagnetic field, the electromagnetic field will lead wire of the electromagnetic field in this range of the electromagnetic induction phenomenon. The technology of mobile phone jammers should be updated.
The phone board resistor, a capacitor, - the appearance of the telephone circuit inductance of various shapes, some inductance is from the appearance is very easy to determine, but some of the appearance of the shape of the inductor and the resistor. The appearance of the capacitor less, it is difficult to judge. Use a multimeter ohm check inductance.