When using an infrared sensor hooked to an arduino that is c

When using an infrared sensor hooked to an arduino that is controling a servo. the servo moves according to the distance the infrared sensor is reading. why is the servo input pin given an angel and not a voltage?

Solution

Since the servo motor is controlled by analog value which is read from infrared sensor,it\'s connected to analog output port.u know the voltage pin give constant voltage to servo motor which make constant operation irrespective of sensor reading.