laser pointer should gain the approval before delivery

laser pointer should gain the approval before delivery.
4 + 1-wire serial interface is GND, SIN, SOUT, STA # and optional INT #, P2 pins are defined as follows: The module also supports three-wire serial interface, in this way, single-chip modules only need to connect with SIN and SOUT signal line and two public ground, the microcontroller through the serial port to send two byte synchronization code (57H, ABH) to replace the original module STA # pin to provide the start signal, to achieve synchronization with the command module. In the two synchronous serial input byte code, the module will check the serial data input time-out, two consecutive data bytes if the interval between the serial input is greater than the timeout, the module will give up the synchronization code and the command packet . The leaders in the laser pointer company lay much importance on the quality assurance of laser pointer . 
When the light spot on the screen to fast motion along the contour graph of persistence of vision, to form a stable graph. With high-speed scanner and computer technology, the use of single-chip control of laser scanning has become a reality, computer-controlled laser light technology is more mature, the scan results look more and more artistic. Now the latest laser display technology, the system also inherits the structure of the previous structure of the laser display system also has the effect of the past, laser show, with the more powerful single-chip performance, not only can control the laser scanning, you can also control the laser of power.
School of Mechanical Engineering, Jiaxing with optical and electrical system of the research team, the current research in optics, Dr. 1, associate professor 3, Mechanical Engineering Professor 3, PhD, associate professor 2, testing and control technology professor 1, Associate Professor 2. Jiaxing College of Advanced Manufacturing Laboratory with Discover CMM, Taichung Seiki CNC machining center, graphics workstations and other advanced design and manufacturing equipment, and CAD / CAE / CAM computer-aided design, analysis and manufacturing software. with a small deformation of the workpiece, the working environment clean, such treatment does not require finish grinding, and is not subject to heat treatment processing equipment, gear size restrictions on the size of the unique advantages as early as 1980, the United States Military research at the Applied Technology Laboratory experiments on laser hardening of gears findings made a broadcast report. The handy use of  laser pointer  will be described in the instruction.New compilation of source files, programming and import it into "Source Group 1" in; in "Options for Target" dialog box, select the "Output" tab "Create HEX File" option and "Debug" tab "Use: Proteus VSM Simulator" option; compile source code, modify the program in error until the adoption. In the Proteus ISIS, the left double-click to open AT89C51 components "Edit Component" dialog box, set the frequency of single-chip 12MHz; in the window "Program File" field, select the previously generated compiled in Keil ". HEX" file; In the Proteus ISIS menu bar, select [File] → [Save Design] option, save the design; in Proteus ISIS menu bar, open "Debug" drop-down menu in the menu, select "Use Remote Debug Monitor" option to Keil support the FBI. The purchase order of laser pointer is getting larger and larger for this laser pointer company.