The keystrokes of green laser pointer are well arranged

The keystrokes of green laser pointer are well arranged
System consists of 430 single-chip system (including buttons and LCD display), optical detection and amplification, AD conversion, the stepper motor drive control circuit. In order to overcome the effects of ambient light and the interference of the measurement process, the system uses eight low-cost optical sensor (divided into 2 groups) for metering.The receiving distance of the receiver of green laser pointer is influenced by the surrounding environment such as interference from electronic equipment. The method is to first photoelectric sensor for each measurement several times and conversion, making the average filter, the filtered result of seeking the difference between the two groups to determine the deviation from the direction of the light source, resulting in stepper motor control signals to control the laser pen movement, to track the source for accurate positioning purposes. The subject used a simple circuit, the algorithm is reasonable. The receiving distance of the receiver of green laser pointer is influenced by the surrounding environment such as interference from electronic equipment, which shortens the remote operated distance.After the actual production and testing, fully meet the essential part of the subject and all the requirements to play some good results. Keywords: Keywords: MSP430 white LED light source tracking sensor stepper motor tracking system 2 point light source (point source tracking system (B title) report on a design, system design demonstration program 1.1 devices use light-sensitive photographic part of the whole design basis, it is particularly important throughout the system. Option One: Using photosensitive resistance as light-sensitive device. photoresistor is made of the photoelectric effect of semiconductors using a resistance value changes with the incident light intensity of the resistor; incident light intensity, the resistance decreases, the incident light is weak, resistance increases. light and volt-ampere characteristic curve as shown below: photoresistor photoresistor light volt-ampere characteristic curves Option II: infrared receiver used as a light-sensitive device. infrared receiver diodes are widely used in various household appliances remote control receiver. well infrared receiver to receive infrared diodes emitting diode emission wavelength of 94Onm infrared light signals, and for other wavelengths of light can not be received to ensure that the receiver accuracy and sensitivity of its directive, subject to outside interference, high precision, especially for a larger proportion of infrared light.