Posted inElectrical Articles
Types of re-lamping
There are two types of re-lamping: Groups re-lamping Sport re-lamping Group re-lamping Group re-lamping is a preventive approach. In this lamps are replaced to ensure a light level when lamps…
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Optical transducer
The optical transducer convert light into electrical quantity. They are also called as photoelectric transducers. The optical transducer can be classified as photo emissive, photoconductive and photovoltaic transducers. The photo…
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Constructional detail and working of LASCR (Light Activated Silicon Controlled Rectifier)
Constructional detail : The basic construction of LASCR (light activated silicon controlled rectifier) is shown in above fig. LASCR is a semiconductor opto electronic switch which has a lens that…
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Difference between IrDA and Bluetooth
Following are the difference between IrDA and bluetooth IrDA Bluetooth Infrared light as communication media. Radio frequency of 2.4 GHz is used as communication. It has max data rates is…
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Construction of photoconductive cells
It is based on the principle that the resistance of certain semiconductors materials decreases when they are exposed to radiations. In others words such material have high dark resistance and…
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Properties of laser light
Coherence Laser light is highly coherent. All emitted photons have constant phase relationship i.e they are in same phase. The light from a laser is said to be coherent, which means the…
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Difference between mesh storage CRT and phosphor storage CRT
Following are main difference between mesh storage CRT(Cathode ray tube) and phosphor storage CRT(Cathode ray tube) Mesh storage CRT Phosphor storage CRT The Mesh storage is appropriate for intensity modulation…
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What is fiber optic communication ?
The fiber optic technology has been developed mostly for use in communication. fiber-optic communication is transmitting information from one place to another by sending pulses of light through an optical fiber. a technology that…
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Applications of infra-red light emitting diode (IR LED)
The important applications of infra-red light emitting diode (IR LED) are as given below, The IR LED is used as a light source in optical systems. The IR LED is…
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Application of light dependent resistor (LDR)
The Light Dependent Resistor (LDR) used for automatic contrast and brightness control in television receivers. The LDR is used in the infrared astronomy. The LDR is used in optical coding.…