Light Sensitive Audio Gain Circuit
Original Publication Date: 2003-Apr-04
Included in the Prior Art Database: 2003-Apr-04
Our design includes a photocell, or light-sensitive resistor, whose resistance varies directly with the amount of light incident on the cell. By incorporating this photocell resistor into the audio gain circuit, the volume of the speakerphone can be directly proportional to the amount of light surrounding the cell phone.