INTRODUCTION The K8004 circuit Pulse width modulation PWM is a technique for obtaining analogue results in digital senses The control is advanced with a square wave and the flag wavers amongst enactment and deactivation ON OFF This wave is hello there and low wave as is known For instance in the event that we have a voltage wellspring of five volts and make a wave from it through the microcontrollers for instance this wave may influence the yield voltage to rate under 5 volts or 4 volts or 3 Or 2 4 or as we need In this mode ON OFF which reenacts voltages between the two situations when they are all in ON condition by 5 volts and when in OFF mode by zero change from the time the flag takes in ON and conversely The time it takes in an OFF condition The time invested in the ON energy is called pulse width Through these concepts and report in a brief summary of the subject mentioned above which I will explain more and explained in detail during several paragraphs and I will mention some characteristics of this circuit and its uses and way of work through illustrations showing the content and in the latter will mention the results of the circuit test and the shape of the graph