Description: Pulse width refers to the duration of a pulse in a pulse-width modulation (PWM) signal. In the context of microcontroller platforms, pulse width is a crucial parameter that determines how long a signal remains in a high state (on) versus a low state (off) during a duty cycle. This cycle repeats at a specific frequency, and pulse width is measured in milliseconds or microseconds. The relationship between the time the signal is high and the total cycle time is expressed as a percentage, known as duty cycle. For example, a 50% duty cycle means the signal is on half the time and off the other half. Pulse width is fundamental in applications where control of power delivered to devices such as motors, LED lights, and other electronic components is required. By varying the pulse width, one can adjust the brightness of a light or the speed of a motor, allowing for precise and efficient control of connected devices. This technique is widely used in modern electronics and is one of the most valued features in programming microcontrollers.
Uses: Pulse width is primarily used in power control applications, such as motor control and LED brightness regulation. In robotics, it is employed to control servomotors, where the pulse width determines the motor’s position. It is also used in audio signal generation and in signal modulation for data transmission.
Examples: A practical example of using pulse width is controlling an LED with a microcontroller. By varying the pulse width in the PWM signal sent to the LED, its brightness can be adjusted. Another example is controlling a servomotor, where the pulse width determines the position of the motor’s arm within a specific range.
