The quality assurance inspection of cell phone jammers is contained

The quality assurance inspection of cell phone jammers  is contained
Terminal expansion, and 2051 less than the 89C51 P0 and P2, input / output port and an external ROM, the RAM in the pin 2051 is only 20 feet. AT89C2051 microcontroller is mainly applicable to relatively simple micro-control system. In this system, used in the AT89C2051 the six external I / O port, an external interrupts and serial output port. 12 Hangzhou University of Electronic Science and Technology graduate design 4-92051 signal pin Figure 4.5-level translation in the different digital systems, the level of the standard is different. The system includes a TTL level standard and RS-232 level standards, to achieve two standard normal communication, the need for level conversion. The harmonious production environment of  cell phone jammers  is necessary.
The system uses a simple MAX232CPE chip. A MAX232CPE chip to be completed by 2-way TTL / CMOS ~~ RS-232 level conversion and 2-way RS-232 to TTL / CMOS, the level conversion. TXD serial output only way the microcontroller in the actual circuit, the RXD serial input. Therefore, the selection of pin 11 by 2051 TXD serial output; corresponding to 14 feet to the computer's serial port input. Figure 4-10 MAX232CPE chip internal structure of Hangzhou University of Electronic Science and Technology graduate design software design 5.1 The general scheme of the system of signal detection and data transmission part, the software part is less involved. The efficient working relationship of  cell phone jammers  is asked for.
2051 MCU Serial Data Communication and programming of the communication protocol. Required to achieve relatively simple for the 2051 programming [12], in the form of assembly. The compiler uses the Keil 7.02b. The compiler is a 51 series microcontroller programming tools, both in assembly, and also supports the C language compiler. Same time improve the debugging capabilities. The system involved in the various parts of the hardware circuit, the overall features are: the circuit is simple in principle, the devices are commonly used devices. More (38 Road) due to the large ones, the larger the size of the circuit, so only 8-way in the production. Therefore, the reasonable wiring to reduce the welding difficulty, to reduce the error rate, while preventing interference.  cell phone jammers  can be built inside the enterprise. Each targeting laser gun emits a laser pulse. If the laser pulse hit the photoelectric target, the use of photovoltaic effect, photoelectric target detector to convert optical signals into electrical signals, so the detection of the laser detector response signal detection. The response of the photodetector is a single pulse signal, the entire testing process including: signal amplification, waveform shaping, the detection output is a standard pulse digital signal. The target for the division of a laser target is divided into 38 detector, center ring 10 to a detector; 9.8.7.6 ring of eight detectors; ring with five detectors. According to different targets on the detector to determine the location of the hit, including the number of rings: 10.9.8.7.6.5. It is developing the competitive supplier of  cell phone jammers  for the enterprise.