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共阴数码管怎么接

更新时间: 2020-11-10 00:00:00     

只在公共接地端接一个限流电阻,视亮暗调节阻值。或者在每一个Q端接一个电阻,视亮暗调节阻值。可改掉上面第一种接法的缺点。如果不接电阻还是太暗的话,是芯片电流驱动能力不够,这样就要加三极管来驱动了。

关键词: 数码 怎么

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