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图1一简单的声光转换器电路图(如音频信号来自一个CD播放机扬声器输出信号)。该电路由一个缓冲/放大级和3个滤波器电路：一个高通滤波器，中通滤波器和低通滤波器。每个滤波器输出驱动电路的不同颜色的LED(发光二极管)。从而实现声光转换。
Figure 1. Schematic Diagram for a Simple Sound-to-Light Converter
Figure 1 shows a simple circuit for converting an audio signal (such as one that comes from the speaker terminals of a CD player). The circuit basically consists of a buffer/amplifier stage and three filter circuits: a high-pass filter, a mid-pass filter, and a low-pass filter. The output of each filter circuit drives a light-emitting diode of different color.

图1一简单的声控LED彩灯电路图

关键词： 电路 滤波器 of filter 一个 cir