搜索 - 科创

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引用第6楼hambaby于2011-11-26 17:17发表的 : 1950年代开始的冷战时期，CIA与KGB热衷于从对方大使馆的外交信件中寻找情报。当时双方已经有非常炉火纯青的技术手段，拆开信...

好了，问题可以说是得到比较好的解决了，显然，hambaby的方案最好。这个问题希望大家踊跃提出建议，但是后面的回帖不会加分了我后来把12V电源改成14V了，所以二极管+继电器可以用，因为用外接电源时不...

引用第67楼hambaby于2011-12-29 03:43发表的 : 超导材料制作电路无意义，因为无法制造出『理想电容器』…… 类似的装置可能是有的，假如真有超导体做的绝妙真空电容，内阻无穷小。...

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