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声控音乐彩灯不仅是儿童所喜爱的电子玩具,也可供人们欣赏、娱乐及招揽顾客。它还能在婴儿哭啼时,起到良好的逗乐作用。工作原理:如图1所示。它由MIC驻极体传声器和A_1、A_2双运算放大器及外围阻容元件组成的声控部分;受控部分则由发光二极管V_3、V_4、音乐集成电路A_3、三极管V_5及扬声器Y所组成。不同的声波经MIC变成电信号,由耦合电容C_1输入到第一级A_1反相放大器的第
Sound-controlled music lights are not only children’s favorite electronic toys, but also for people to enjoy, entertain and attract customers. It can also play a good amusing role when the baby is crying. How it works: As shown in Figure 1. It consists of MIC electret microphone and A_1, A_2 dual operational amplifier and the external RC components composed of the voice control part; controlled by the light-emitting diodes V_3, V_4, music IC A_3, transistor V_5 and speaker Y composition. Different sound waves into the electrical signal by the MIC by the coupling capacitor C_1 input to the first stage A_1 inverting amplifier