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光敏三极管开关电路怎么设计?_其他_设计456问答
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光敏三极管开关电路怎么设计?

浏览:45次 | 提问时间: 06-26 05:13
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1个答案
你非我良人怎知我深情 06-26 05:14

建议你采用可控硅控制,电路简单,成本低,可靠性高,零件可以直接搭接,不需要做电路板,适合初学者制作.下面给你些建议:1、因为三极管是单向控制的,你至少需要1个桥堆进行整流。2、因为天黑和天亮光敏电阻的阻值是线性变化的,为保证三极管不会处于半饱和状态而发热,你至少需要一个史密特触发器(例如NE555集成块),或者用几个三极管搭建成史密特触发器结构。

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