系统上电后会有提示音，并且数码管显示0。K1键使数码管进行十六进制减1计数显示，K2键使数码管进行十六进制加1计数显示。数码管显示的同时，发光两极管将显示对应的二进制数。亮表示1，灭表示0-Power system will be prompted after the tone and digital display 0. K1 key for digital control by a count of hexadecimal display, K2 keys for digital contr

To create an LCD, you take two pieces of polarized glass. A special ... Consequently, no light can pass through that area of the LCD, which makes that area darker than the surrounding areas. Building a ... For example, imagine that you want to create

圆极化天线，可以应用于可穿戴设备，左旋圆极化。(Circularly polarized antenna)