potentiometer.md

Potentiometer 電位計

• Potentiometer - Wikipedia #ril

  • A potentiometer is a THREE-TERMINAL resistor with a sliding or rotating contact that forms an adjustable VOLTAGE DIVIDER. If only two terminals are used, one end and the WIPER, it acts as a variable resistor or rheostat (變阻器). 顯然 potentiometer 不只是可變電阻，重點是可以從中間的接腳 (連接到內部的 wiper) 讀取到不同的值。

    

  • The measuring instrument called a potentiometer is essentially a voltage divider used for measuring electric potential (voltage); the component is an implementation of the same principle, hence its name. 因為原理與量測電勢 (electric potential) 的儀器同，所以用了相同的名字。

• Arduino - AnalogReadSerial 稍微帶到 potentiometer 運作的原理 #ril