搜索 - 科创

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ne555只能控制500khz的方波，目前有个项目需要最高5Mhz，实现频率占空比可调，产生直流方波脉冲。请问各位有类似NE555的元件，能在5Mhz下实现类似功能吗？

不知大家遇没遇到这种情况，就是线圈初级谐振电容一段时间以后莫名其妙的电容量变小了我用的是电磁炉谐振电容，先前是。0。42uf 现在变成0。11了不知道为什么

今天上午赶制了两枚火箭，但发射均失败。总结了原因： 1.材料不耐高温，被融掉。 2.推力不够隔热层是否能使材料耐高温，一般怎么做隔热层？燃料制作是用的热熔法，燃烧起来不错。但是在把硝酸钾倒到融化的糖...

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