Hello friends! Today, we are going to discuss power factor measurement using a microcontroller in Proteus. We will use the ATmega8 project to understand how the timing difference between voltage and current can be converted into a phase angle, and then into a power factor reading on an LCD. I will start with the electrical meaning of power factor, because a correct calculation is useful only when we understand what it measures. After that, we will examine the zero-crossing stages, choose a timer resolution, work through numerical examples and discuss the changes needed for reliable firmware. The circuit is an educational simulation using separate signals to represent voltage and current. Its timing method is appropriate for sinusoidal waveforms. When a load draws distorted current, we need ...