What are LEDs? Light Emitting Diodes (LED) is a semiconductor that produces light and only allow current to flow in one direction. Basically LED is an incandescent light bulb that uses less power and produces less heat. They also last longer than the traditional light bulbs and are used in many applications.
How do LED work? In a led there are p-type semi-conductor material containing positively charged carriers called holes is combined with n-type semi-conductor material containing negatively charged carriers called electrons. The led consists of the n-type material bonded to a section of the p-type material with electrodes connected at each end. This would only allow electricity to move in one direction. When a current is applied to the LED, the electrons are forced to move in one direction and the positive holes move in the opposite direction towards the electrons. When the electron combines with a hole, light is produced. How does RGB LED produce multiple colours? A RGB LED is simply 3 small LEDs combined together. The 3 small LEDs each produce a different colour. One produce red, one produce green and one produce blue light hence the name RGB. The colour of the light that the LED produced is determined by the conductor material. AlInGaP(Aluminium Gallium Indium Phosphide) is used to create red LED while InGaN(Indium Gallium Nitride) is used to produce blue and green LEDs.
Where are LED used There are a diverse number of applications that uses LED lights, and many things wouldn’t exist without LED lights. The use of LEDs ranges from interior lighting, advertising banner to aviation lighting. In fact the optical mouse that you are using right now has an LED on it. LED have allowed more less power consumption device to be produce and developed as well as having a longer life span. LEDs are also considered as a safer way of lighting than any other ways mainly because it doesn’t require a high voltage to operate unlike its counterparts. As a result produces less heat which means it’s less of a safety hazard.
What is electricity Electricity is a form of energy; it can be defined as the flow of electrons through a circuits. Current is the measure of the quantity of electrons flowing per second. The unit for current is the ampere or amp(A). Voltage is the measure of the electrical pressure that is forcing electrons through a system. The units for potential difference are volts(V). Wattage is the measure of electric energy that an electric device consumes. It is the measure of the current an item draws and the potential difference. The unit for watt is(W) How to calculate Watt Wattage = Voltage x Current W = V x A