搜索 - 科创

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那个电容我加了，没有省略。。唯一与原电路不同的只有那个音频耦合电容。。换成100nf...。。。494就这样不明不白地死去。。。。一个494我那4元一个 [s:241] 。。。除了那个200UF 电容...

喷燃比如下定义：----------------------------------------------平均喷燃比=半厚燃烧面积/喷管面积喷燃比=(药柱长度*pi*((药柱直径-药柱中空直径)/2+

任某人的意思应该是说，利用NE555来使高电平时间恒定，通过改变低电平时间来改变占空比，最终达到改变电压平均值的的目的，是这样的吧？ [s:227] 滤波电路应该就是利用给电容充电和泄压电阻来实现的吧...

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