硬件设置小工具，电阻值计算excel，表列出了常用电阻值，只需要输入电源电压，需要电压俩个电压值，就可以算出分压电阻，误差5 以内会有绿色标注-Hardware settings gadgets, resistance calculation excel, table lists the commonly used resistance, only need to input power supply voltage, the need to voltage two voltage values

一种设计数字锁相环的思路，包含异或鉴相器、k模可逆计数器、脉冲加减计数器、N分频器等，实现相位的锁定。(A design of digital phase locked loop (PLL) consists of a phase discriminator, a K mode reversible counter, a pulse addition and subtraction counter, a N frequency divider and so on, to lock the pha