Servo Moter controller using 555

This circuit I used the 555 timer IC in Astable multivibrator mode Pulse Width

Modulated signal usually with a frequency of 50 Hz (ie 1 ms time period) or 25 Hz

(40 ms time period). The servo angle varies according to the signal on time (which

is also known as pulse duration or pulse width.)

Potentiometer can be used to control the position of the servo. It produces a

Positive pulse between about 0.9 milliseconds and 2.1 milliseconds. The off time

between pulses is about 40 milliseconds.