搜索 - 科创

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猎鹰发表于 2014-8-11 21:46 能不能稍微科普一下，这种机子的原理啊？ PCB之间的电阻也该有很大的影响吧，这是如何消除的？没错，因此你看到了。

不过以我一贯的追求，简单地原样复制原理图，计算参数，显得逼格不够。必须有所创新才行。UCD是个单端自激振荡电路，输出是半桥结构。需要正负电源。在便携式设备中，往往需要简化电源，单电源最好。

限流电阻不能取太高，我是接上接 1K 到IO ，IO 通过 100~10欧姆电阻到 ULN2003/8 要学会看看元件的PDF 说明书，这个问题可以自己找到原理示意看这个原理以知道，输入什么得到什么

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