Tag Archives: phototransistor ambient light sensor

Photo transistor is a type of transistor whose base bias is infrared light. The amount of current flowing between the collector and the emitter is proportional to the intensity of light received by the photo transistor. Photo transistors are often used as an infrared light control switch, which utilizes saturation (saturation) and off (cut off) conditions from the photo transistor. ...

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 ...