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Solid State Voltmeter

Solid State Voltmeter: Solid State Voltmeter - Figure 4.13 shows the circuit of an electronic voltmeter using an IC OpAmp 741C. This is a directly coupled very high gain amplifier.…

Chopper type DC Amplifier Voltmeter (Microvoltmeter)

Chopper type DC Amplifier Voltmeter (Microvoltmeter): Chopper type DC Amplifier Voltmeter the dc input voltage is converted into an ac voltage, amplified by an ac amplifier and then converted back…

Transistor Voltmeter (TVM): Transistor Voltmeter - Direct coupled amplifiers are economical and hence used widely in general purpose low priced VTVM' s. Figure 4.9 gives a simplified schematic diagram of…

Thermocouple Principle and Types of Thermocouple

Thermocouple Principle and Types of Thermocouple: Thermocouple Principle consists of a junction of two dissimilar wires, so chosen that a voltage is generated by heating the junction. The output of…

DC Ammeter

DC Ammeter: DC Ammeter - The PMMC galvanometer constitutes the basic movement of a dc ammeter. Since the coil winding of a basic movement is small and light, it can…

7 Segment Led Display Working Principle

7 Segment Led Display Working Principle: In 7 Segment Led Display, it is usual to employ a single LED for each segment. For conventional 7 Segment Led Display (including the…

Gas Discharge Plasma Display

Gas Discharge Plasma Display | Nixie Tubes - Symbolic Representation: Gas Discharge Plasma Display - These are the most well-known type of alphanumeric Plasma Display. Their operation is based on…

What is Liquid Crystal Display (LCD)?

What is Liquid Crystal Display (LCD)?: Liquid Crystal Display (LCD) are passive displays characterized by very low power consumption and good contrast ratio. They have the following characteristics in common.…