
A photodiode is a type of photo detector capable of converting light into either current or voltage, depending upon the mode of operation.Photo diodes are similar to regular semiconductor diodes except that they may be either exposed or packaged with a window or optical fiber connection...

"Logic circuit is an electric circuit whose output depends upon the input in a way that can be expressed as a function in symbolic logic; it has one or more binary inputs (capable of assuming either of two states, e.x:- "on" or "off") and a single binary output".Electronic circuits which...