How to generate PWM waveform using 555 timer || Gate Pulse Generator || Proteus Tutorial

PWM (Pulse Width Modulation) is a important feature of today’s every microcontroller due to its requirement for controlling many devices in every field of Electronics almost. PWM is widely used for motor controlling, lighting controlling etc. Sometime we do not use microcontroller in our applications and if we need to generate PWM without microcontroller then we prefer some general purpose ICs like op-amp, timers, pulse generators etc. Here we are using a 555 timer IC for generating PWM. 555 Timer IC is a very useful and general purpose IC which can be used in many applications. What is a PWM Signal? Pulse Width Modulation (PWM) is a digital signal which is most commonly used in control circuitry. This signal is set high (5v) and low (0v) in a predefined time and speed. 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”.  There are two important parameters for a PWM as discussed below: Duty cycle of the PWM: The percentage of time in which the PWM signal remains HIGH (on time) is called as duty cycle. If the signal is always ON it is in 100% duty cycle and if it is always off it is 0% duty cycle. Duty Cycle =Turn ON time/ (Turn ON time + Turn OFF time) Generate Pulse Width Modulation (PWM) Signal using 555 Timer IC 555 Timer PWM Generator Circuit PWM (Pulse Width Modulation) is a important feature of today’s every microcontroller due to its requirement for controlling many...