To free-axis RLC measuring lower precision caused by adopting analog phase discriminator, a measuring method based on digital phase discriminator is adopted.

针对自由轴法RLC测量中因使用模拟鉴相器导致测量精度低的问题，提出采用一种基于数字鉴相的测量方法。

youdao

Analog joystick with central push-button two axis (X and Y) and a center pushbutton.

ENGADGET: Arduino Esplora helps you learn microcontrollers without the pesky breadboard

This means a single analog input of the microcontroller is shared among all the input channels (except the 3-axis accelerometer).

ENGADGET: Arduino Esplora helps you learn microcontrollers without the pesky breadboard