Please do not give the green laser pointer to children

Figure 3.1 shows the program uses a voltage comparator method, the acquired voltage signal compared with the reference voltage to generate high-low pulse to get through the level of change detection signal, the reference voltage control instability, and the resulting negative level may burn microcontroller, as shown in Figure b the use of a voltage follower, the signal input to the chip without distortion processing, measured by a comprehensive comparison, we use the program shown in Figure 2 for signal detection. 3.2 Signal processing part of the detection signal into the microcontroller I / O port, through the A / D conversion, into a digital pulse signal when the light intensity from the reference point,Each set of the  green laser pointer   has its own characters. the program through the acquisition of adjacent light intensity, light intensity compared with the baseline control motor turn, accurately track the specific location of the light source, the initial time set the reference voltage signal, or pre-scan the entire light area, to determine the point of maximum light intensity of the signal voltage corresponding to the reference voltage, when the light source moves, the photodiode receives light intensity decreases, then the microcontroller to control the motor to the surrounding space looking for light, when to find the location of the maximum light intensity when the motor stops moving, and laser pointer to be lit, 3.3 motor drive control part of the head through the drive motor rotation direction, respectively, up, down, left, right,Please do not change the emitter and receiver of   100mW green laser pointer   or it couldn’t work normally. the four directions of the relay control, the horizontal direction, when the light intensity changes, the software system default motor to the left turn, if the left light weakened, then turned to the right, to detect the point of maximum light intensity, then to the right to find, if the light intensity decreases, then return to point of maximum light intensity. Motor control part of the diagram in Appendix 4, the software system design through the 430 microcontroller programming, the use of the A / D module to complete the acquisition by an external pulse counting circuit, the motor rotation direction for software control, is mainly to highlight the programming software If there’s a mixture, please contact the local  50mW blue violet laser pointer   agency.The purpose of the control hardware, as shown in Figure 4.1 6 7 5 Figure 4.1, point source design, measurement and display the current part of this module is provided with TI INA270 chip by adjusting the potentiometer to change the LED brightness at the same time, The current flowing through R1 value is changing, amplified 14-fold by the end of the output of the analog signal OUT sending people 430 microcontroller A / D module is converted into digital, then digital tube display. As shown below: 6, test results and error analysis using a white light LED, fixed at a height of one meter bracket, DC power to its power supply, potentiometer can be used in its current range of 150mA to 350mA regulator, use of lens light gathering point for the laser pointer to point accurately track point, laser pointer on the bottom, through commissioning the laser pointer to point to accurately track the points. Please do not load the battery inverse in the    200mW green Laser Pointer  .Test results: at room temperature 25 ℃, under ordinary laboratory conditions, through field testing, the use of potentiometer adjustment enables the flow of current through the LED 110mA to 550mA range of changes to meet the subject requirements.
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