The applied battery of green laser pointer

R1, R2, R3 for the photoresistor. A, B, C for the voltage output, R4, R5, R6 for the resistor divider. R7, R8, R9 is used to adjust for the variable bit size of the output voltage. Which R4 = R5 = R6 = 22K
As the photosensitive resistance decreases with the increase of light intensity on the page so the composition of the circuit, time-sensitive light enhanced resistance decreases, the larger the output voltage output, so that you can track the changes in light intensity.You can operate the   green laser pointer   by aiming it at any direction. Then A, B, C three output voltage into a binary number by the AD conversion processing by the microcontroller to control the rotation of the steering gear to find the source. Photosensitive resistance varies from a few thousand ohms to several hundred kilohms, so choose the resistor value is 18K, Pot selected resistance range from 203 0 to 20 kilohms.
Third, the schematic and design documents
3 system software design
As the core of the system module, system performance parameters and process control and part of the structure and processes are closely related. By using the   Blue Laser Pointer   you can realize the true meaning of wireless freedom. Can be realized by the software programming of the digital control mechanism, the external digital input signal by a certain algorithm find related digital output control signals, and then drive mechanism, which is the main principle of digital control.
Optical signal received by the microcontroller and change the electrical signals converted by the AD within the binary, from the microcontroller to compare the results of the comparison as the next rotation of the steering gear. Through continuous sampling, computing, motor rotation, and then sampling, in order to achieve light source tracking system for automatic tracking. Software flow chart as shown below.You may operate the   100mW laser pointer  at any corner of the place.

Fourth, the test methods and data
1 test methods and processes
By the theoretical analysis shows that the system of high precision sensors. Mainly fine-tune the angle of the sensor.
Preparation before the test:
Give a point source power, adjust the current value of point light sources, the required range, then the rest of the device to power the system detects whether the sensor directly into the normal working condition. You may operate the  5mW laser pointer    at any corner of the certain room.Then, manually align the laser pointer light to see the light of the three sensors measure the situation, mainly to ensure that the edge of the measured values of the two sensors is relatively close to their respective circuits by adjusting the sliding rheostat in series to adjust. Then test the middle of the sensor measurement value is the maximum, and fine-tune instruction sets, sensor measurements are significant changes, then press the start button, you can test.
Test Method:
Preparation before the test after the end, let it run automatically, automatically find the point in the light, and    200mW Laser Pointer  the correct instructions, adjust the light source along an arbitrary direction, observations.The   green laser pointer   can be used combining with the projector.
2 Test apparatus and materials
DC Power Supply Digital Multimeter point light source holder
3 test results and develop some
The same point source location, location of the mobile laser pointer instructions.