Cell phone jammer needs the accurate circulation

Conducive to the cell phone system integration module, low cost. In remote areas, islands and other difficult to set up communication lines or economy, and engineering services can be flexibly set free, no longer subject to terrain conditions. In short, GSM module inexpensive, widely used, has an attractive prospect. The  cell phone jammer system project should be approved at first.
Enhanced ESD structure for all transmitter outputs and receiver inputs protected to withstand ± 15kV IEC 1000-4-2 Air-Gap Discharge, ± 8kV IEC 1000-4-2 Contact Discharge and ± 15kV Human Body Model. TC35 of the SYNC pin has two modes, the available AT commands AT SYNC switch. One is the launch indicates the growth of state power, the other is instructed TC35 working condition. This module uses the latter function: When the LED goes out, indicating that the TC35 is off or asleep; When the LED light is 600ms / 600ms put out, indicating that there is no SIM card inserted or network login in progress TC35; When the LED light to 75ms / 3s put out, indicating that TC35 has logged into the network, is holding machine state. System software design program focuses on the process of programming the microcontroller. Different to the TC35 via AT commands to write, to complete a variety of functions, such as network logon, read the SIM card cell phone numbers, send SMS messages, receive SMS messages and so on. The main program flow shown in Figure 5.The engineer can finish the circulation of  cell phone jammer without any mistake.
Among them, the initialization of the work including setting serial speed, wireless network login and set the text mode to PDU. PDU encoding includes encoding rules generated by the PDU string. MCU control TC35 module sending the message instance see Articles Website www.dpj.com.cn. As the GSM standard, the Chinese encoding uses Unicode encoding, rather than the current commonly used in GB-2312 encoding, so the need for Chinese coding conversion, font to display Chinese characters. Chinese character encoding conversion program under Delphi see Articles Website www.dpj.com.cn. The intelligent  cell phone jammer system for prison is more humanized.
Start from the open-drain transistor circuit and power-on reset circuit. 10ms after power module (battery voltage must be greater than 3V), to make it work, you must within 15 feet () plus the length of at least 100ms low-level signals, and the signal fall time less than 1ms. Started, the signal should be kept 15 feet high. cell phone  jammer needs the accurate circulation.
A baseband processor integrated with ISO 7816-3 IC Card standard compatible SIM interface. In order for the external SIM interface that connects to the primary interface (ZIF connector). GSM11.11 reserved for the SIM card in the five pins on the basis of, TC35 in the ZIF connector reserved for the SIM card interface, a 6-pin, the added CCIN pin is used to detect whether the inserted SIM card holder a SIM card. When you insert the SIM card, the pin high, the system before entering the work. Data communication circuit was completed for short messaging, and PC communications, software flow control. Data communication circuit to Maxim's MAX3238 chip as the core of level conversion and serial communication functions; with low power consumption, high data rate, enhanced ESD protection and other features. The circulation of  cell phone jammer should be accurately performed.