Indicators and Display Devices

Indicators and Display Devices:

Basic Meter Movement : Basic Meter Movement – The action of the most commonly dc meter is based on the fundamental princi­ple of the motor. …


Digital Display System : Digital Display System – The rapid growth of electronic handling of numerical data has bought with it a great demand for …


Dot Matrix Displays : Excellent alphanumeric characters can be displayed by using dot matrix LEDs with an LED at each dot location. Commonly used Dot …


Electrodynamometer : Electrodynamometer – The D’Arsonval movement responds to the average or dc value of the current flowing through the coil. If ac current is sought …


Electrophoretic Image Display : Electrophoretic Image Display is the movement of charged pigment particles suspended in a liquid under the influence of an electric …


Gas Discharge Plasma Displays : Gas Discharge Plasma Displays – These are the most well-known type of alphanumeric displays. Their operation is based on the …


Incandescent Display : Incandescent Display has been a basic process of light generation for several decades. This process is now down in fully integrated electronic …


Light Emitting Diodes(LED) : The Light Emitting Diodes, Fig. 2.10 (a) is basically a semiconductor PN junction diode capable of emitting electromagnetic radiation under forward …


Liquid Crystal Display(LCD) : Liquid Crystal Display(LCD) are passive displays characterised by very low power consumption and good contrast ratio. They have the following characteristics …


Liquid Vapour Display : Liquid Vapour Display are the latest in economical display technology. They employ a new reflective passive display principle and depend on the presence …


Moving Iron Types Instrument : Moving Iron Types Instrument can be classified into attraction and repulsion types. Repulsion type instruments are the most commonly used. Iron …


Permanent Magnetic Moving Coil Movement : Permanent Magnetic Moving Coil Movement – In this instrument, we have a coil suspended in the magnetic field of …


Practical PMMC Movement : The basic Practical PMMC Movement (also called a D’Arsonval movement) offers the largest magnet in a given space, in the form …


Printers : Character printers and graphic plotters are the two devices used to prepare a permanent (or hard copy) record of computer output. The basic difference …


Repulsion Type Moving Iron Instrument : A variation of the radial vane instrument is the concentric vane Repulsion Type Moving Iron Instrument. The instrument has …


Segmental Displays using LEDs : In Segmental Displays using LEDs, it is usual to employ a single LED for each segment. For conventional 7 segment LED …


Segmented Gas Discharge Displays : Segmented Gas Discharge Displays work on the principle of gas discharge glow, similar to the case of Nixie tubes. They …


Taut Band Instrument : The Taut Band Instrument utilizes the same principle as the D’Arsonval movable coil and fixed magnet. The primary difference between the …


Types of Instrument : Types of Instrument – Analogue ammeters and voltmeters are classified together, since there is no basic difference in their operating principles. …