Tag Archives: ambient light phototransistor circuit

This component has the same properties as the transistor that produces the cut off and saturation conditions. The difference is, when the transistor cutoff condition occurs when no current flows through the base to the emitter and saturation conditions occur when there is current flowing through the base to the emitter then the phototransistor cutoff condition occurs when no infrared ...

The basic circuit that can be used to use Photo Transistors As Light Sensors can use the following simple circuit. 1. Basic Circuit With HIGH Logic When Detecting Light With the configuration in the first image above the photo transistor is able to provide HIGH logic when receiving light emission. At the receiving light, the collector-emitter foot conductivity value will ...