Electrical Formulas, Calculations, Basic Electronic Engineering Reference. PICPLC16 v6 PLC System - PIC Microcontroller Board. Downloads Page - Software, Drivers, Schematics, User Manuals. Integrated circuits. 9. Opto-electronic components Optoelectronic components (or as often referred to photo-electronic components), are electronic components which produce light or react to it. Some components among them are LEDs (Light Emitting Diodes), photo transistors, photo diodes, photo resistors (or LDR – Light Dependant Resistors), different visual indicators, light emitters and detectors, optocouplers, etc. Many of those components can be recognized easily recognized because of the “window” on the component's case which is used to pass the light.
Sometimes, instead of a window, there is a small lens, which directs light to some predestined location inside of the component. 9.1 Photo-electronic components We already mentioned the most frequently used component of them – the LED. Another application of LEDs is a LED display. Emitting diodes are special kind of photo-diodes. There are several optocouplers and their cases on 9.4. 9.1 Examples.