👉 A phototransistor is a type of semiconductor transducer that converts light into electrical signals. It consists of two layers, one for the forward voltage and the other for the reverse voltage, with an electric field applied to them. When light passes through the phototransistor, it creates an electric current, which can be measured by measuring the difference between the forward and reverse voltages. This allows the phototransistor to measure the intensity of light and convert it into electrical signals that can
