In this experiment, we study and measure the P-I characteristics of Light Emitting Diode (LED), which used in optical fiber communication as a light source. The role of the optical transmitter is to convert an electrical input signal into the corresponding optical signal and then launch it into the optical fiber serving as a communication channel.
LEVEL 1: Construct a simple LED circuit, test the power rating of LEDs a) Select a red LED from your electronics kit. Obtain a 220 Ω and a 1kΩ resistor from the component bins. Using the +25V supply (set to 5 volts) as the power source, connect the LED,
LED (Light-Emitting Diode) Experiments for Science Labs
This method involves coating an LED of one color (mostly blue LED made of InGaN) with phosphor of different colors to produce white light, the resultant LEDs are called phosphor-based white LEDs. A fraction of the blue light undergoes the Stokes shift being transformed from shorter wavelengths to longer.
Lab 6: Light emitting diodes - University of Tennessee
In this laboratory you will measure the voltage across several visible light-emitting diodes (LED's) as a function of the current flowing through the diodes. You will use your data to estimate the band gap of the semiconductor material the diode is …
In this experiment you will study the characteristics of three indicator LEDs that emit in the infrared, red and blue parts of the spectrum. Check that the longer lead wire of the LED is the positive
Light-emitting diodes (LEDs) convert electrical energy into light energy. They emit radiation (photons) of visible wavelengths when they are “forward biased” (i.e. when the voltage between the p side and the n-side is above the “turn-on” voltage).
Diodes are circuit elements that allow current to pass in one direction, while blocking it in the other direction. They are used primarily in rectifier circuits, which convert AC to DC, and in voltage regulation and voltage limiting circuits.
:- A study of characteristics of light emitting diode (LED). - Tripod
Take care to apply suitable forward voltages across the LED so that suitable forward currents flow through the LED. Otherwise the LED may be damaged.
Study Of LED and Detector Characteristics - Amrita Vishwa …
Light emitting diodes, commonly called LEDs, are real unsung heroes in the electronics world. They do dozens of different jobs and are found in all kinds of devices. Among other things, they form numbers on digital controls, transmit information from remote controls light up watches and tell you when your appliances are turned on.
Characteristics of LED - CHARACTERISTICS OF LED Expt No
Aim: To study the characteristics of Light Emitting Diode(LED) and to determine the wavelength of radiation emitted. Apparatus : LED, D Power supply (10V), Voltmeter, milli Ammeter, Rheostat, etc. Theory : LED is a semiconducting p-n junction diode which emits light when it is forward biased properly.
- 评论数: 18
跳至内容