What Are PWM Signals and How Do They Control Robot Actuators PWM signals actuators represent the fundamental control mechanism linking microcontroller logic to physical motion in student robotics. Understanding pulse-width modulation (PWM) isn't optional theory—it's the exact signal-processing skill that separates learners who assemble kit robots from those who can spec motor controllers for real automation projects. This knowledge maps directly to industrial automation roles where PLCs and motor drivers use identical principles, making it one of the highest-ROI topics in a progressive robotics curriculum. What Is PWM and Why It Matters for Actuator Control? Pulse-width modulation is a digital signaling technique that varies the duty cycle of a square wave to simulate analog voltage levels. Instead of outputting smooth voltage changes (true an ...