Pulse Width Modulation Circuit. Let s first start with some pwm fundamentals. Pulse width modulation pwm provides the precision and the control range required by modern electronic devices.
Dc Motor Speed Controller Using Pulse Width Modulation Motor Speed Motor Electronics Circuit from id.pinterest.com
Using a simple circuit as an example a modulating signal in the form of a sine wave applies to one terminal and a carrier signal applies to the other terminal. Many electronics hobbyists who build robots and other moving things recognize the term as it pertains to controlling the speed of a motor. The classic method of creating the oscillation is with a resistor capacitor rc circuit.
Since we can modulate the width of the pulse it got its iconic name pulse width modulation.
The time during which the signal stays high is called the on time and the time during which the signal stays low is called the off time. That s what we seek to achieve here. At its core pulse width modulation pwm is just another modulation technique like am or fm among others. Let s first start with some pwm fundamentals.
