3 Simple Projects With 555 Timer IC | DIY Electrix

This simulation shows a 555 timer operating as a pulse-width modulation (PWM) generator. The timer produces a constant-frequency square wave, while a sinusoidal control voltage is applied to the control pin through a capacitor and diode path. Instead of changing frequency, the circuit smoothly adjusts the duty cycle of each pulse according to the sine wave level. As the control voltage rises, the pulse stays high for a longer time; as it falls, the high duration shortens. The resulting stream of