Arduino Analog Variable Rotation Sensor

This Variable Sensor is based on an adjustable potentiometer, its designed not only as a variable resistor to control motor speed, it can also measure angle with a simple pendulum wheel installed in its rotation head. This devices rotating angle measurement ranges from 0 to 300 degrees. It can be connected to a sensor shield with a 3-pin sensor wire lead. Its very easy to achieve position-dependent interaction when using this sensor with ATmega controllers.