Diodes and circuit boards: Diodes are semiconductors devices that only let the electric current pass one way. Every diode has marked an arrow to the way that the electric flow is being allowed. They can vary in size, but the most common kind used today is semiconductors diodes. They are being used for many ways, like batteries that often contains diodes to protect the equipment if the battery is put backward.

There can also be found a variety of other types of diodes like: the Zener diode, used for intensity stabilization, Varicap diode, Tunel diode, Gunn diode. They can be used as voltage regulators, frequency multiplying devices, mixing devices, switching applications or they can be used in making logic decisions in digital circuits.

Some diodes and electrical components can give “light” and most of the people know this in the term of LED (light-emitting-diodes) that are used even in the domestic lightning or illuminating in general, as well as a sensor, in the telecommunications, especially for the remote controllers. A LED produces light more from electronic excitation than heat generation and it is so common these days that the inventors had no idea how great their idea will be.
Circuit boards, on the other hand, were created in the 1930s and in that time they were used in the World War II for radios. Before they could go out the market for a more variety usage, a long time circuit boards stayed only in the military area. It is mostly known as PCB – Printed Circuit Board and it is like a plate on which there are put chips or another electronic components. Circuit boards may also refer to printed circuits assemblies, or printed wiring boards and capacitors. They are being used in computers, mobile phones, gaming devices and video players. Most of the producers of electronic devices prefer using circuit boards because they have a small cost, they last long and they are very durable.

One of the most important roles of the circuit boards is regulating the flow of power for various aspects of a device. They are made of copper foil and everyone can recognize the green layer that is being coated on every circuit board. Also, before entering the market, every circuit board is being tested, so that it could not be the risk of damaging the device it will be put on or to melt if the temperature gets too high or even worse, to start an electrical fire.