Hello friends! Today, we will generate a PWM signal with an 8051 microcontroller and inspect it in Proteus. We will begin with frequency and duty cycle, then use Timer 0 interrupts to control P2.0 without placing a long delay in the main program. The original project demonstrates software-generated PWM, which is useful for a classic device such as the AT89C51 that does not provide a dedicated PWM peripheral. Other 8051-compatible devices can include hardware PWM, so check the exact processor before deciding that software generation is necessary. We will keep the original circuit, waveforms and download, but make the timing assumptions and endpoint behavior explicit. The revised example uses a fixed timer interval and twenty duty steps, making the relationship between interrupt rate, PWM fr ...