A light-emitting diode is a diode that emits light even if there is no voltage between the input and the diode. When a current flows through the diode, electrons in the diode recombine with oxygen or nitrogen vacancies, releasing energy as photons. Photons have an energy level that changes depending on the type of atom… Continue reading Diode Light Emitting Diodes: An Overview
A proximity sensor is simply a device able to detect the existence of other objects without any direct physical contact being made with it. These devices are very useful and can be used in many applications. They are most commonly used in security and access control systems. They can be installed indoors and other points… Continue reading What Types Of Proximity Sensors Are There?