搜索 - 科创

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今天，我在试验自己做的点子打火机，电路的2个可调电阻已经调试好了，NE555也正常工作，但是当我再换另一个NE555时（还是原来的样子）怎么还要再次调试NE555才可以拉出电弧？当我再换一个NE555...

因为不久前把好的坏的场管混在一起了，所以今天想把他们分开一下，，结果碰到一种我无法理解的情况，，我用万用表二极管档测(短接表笔会“哔----”叫的)，，，红表笔接D，黑表笔接S，木有反映，，，然后在G...

[s:118] 本人初三，理论知识不够，设计火箭金属发动机困难。。。求大神给一张20~30cm左右长的发动机图纸[s:104] 因为家里做五金和灯，设备什么都有，加工方便。故求金属发动机图纸[...

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