搜索 - 科创

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半导体科学研究始于19 世纪初叶，那时候研究的都是自然界里的材料(矿石晶体)：1833 年，法拉第(M. Faraday)在研究硫化银的电导时，第一次观察到电阻的负温度系数；1873 年，史密斯(W....

经验要靠多焊，多摸索，焊过一万个点，保证焊工娴熟。数电实践，请从FPGA或者CPLD开始，买个开发板，工具链用熟，又快又好。楼主的情况，烙铁头活性不够，建议改换数显恒温烙铁，配进口铜芯镀膜烙铁...

@ry7740kptv 目前所有能做到防拆安全的设备，内部必然带小电池的，通常是一个纽扣电池。微安级别放电，能工作2年左右。目前的安全CPU，通常也有多路供电的设计，当主电源（比如主电池或者USB插入...

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