matlab 在led二次光学设计中的数值计算例程，不是原创，不过很有参考价值.-LED the secondary optical lens design in the design, according to the principle of nonimaging optics, using matlab to generate two-dimensional point coordinates, can be introduced into 3 d modeling software, p

LED blink, turning on or off with the arduino coding. As well as including the servo motor with ultrasonic sensor.