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Tuesday, August 3, 2021

Different types of switches.


 Types of switches,

Basic lease which can be of two types they are.

*Mechanical

*Electronic

Mechanical switches are physical switches which must be activated physical by moving racing releasing or touching its contact.

Mechanical switches 

Mechanical switch

Mechanical switches can be classified into different types based on survival factor such as method of accusation communal limit and process number of content (single content and multi content switches),(SPST,DPDT,SPDT,etc).

Single pole single throw switch (SPST)

* This is the basic on and of switches consisting of one input contact and one output contact.

* It switches a single circuit and it can either make( on) or break (off )the lord.

* The contact of (SPST)can either normally open or normally closed configuration.


SPST symbol

 
SPST Image

Single pole double throw switch (SPDT)

* This switches has three terminal 1 is input contact and remaining two are output contact.

* This means it consists two on position and one off position.

* In most of the circuit these switches are used us change your over to connect to the input between two choice of output. 


SPDT symbol







SPDT image

Double Pole single throw switch (DPST)

* This switch consists of four terminal to input contact and two output contact.

* It behave like a two separate SPST configuration operating at the same time.

* In off position both switch are at open State.

* Desh type of switch is used for controlling two different circuit at a time.

DPST symbol







DPST image

Double pole double throw switch (DPDT)

* This is a dual on\off switch consisting of 2 on position.

* It has six terminal to our input contact and remaining for are the output contact.

* It behave to separate SPDT configuration operating at the same time.

DPDT symbol







DPDT image

Push button switch.

* It is a monetary contacts which the make or break connection as long as purpose is applied or when the button is pushed.

* Generally this pressure is supplied by a button pressed by some one finger.

* Desh button return it normally position on the pressure is removed.

* The internal spring mechanism operates this two state (pressed and released) of a push button.

 A push button switch is a momentary switch that is activated by pressing a button. It is spring-loaded and returns to its default position when released. Push button switches are commonly found in control panels, machinery, and consumer electronics.


Push button symbol









Push button image
 

Fleat switch.

* Floss which are mind used for controlling DC and AC motor pumps. According to the liquid are water in a tank or pump.

* This switch is operated when the float (aur floating object). Moves downward and upward best on water level in a tank .

* This floor movement of road or chain assembly and count wait causes to open or close electrical contact.




Float switch image


There are various types of switches used in electrical and electronic circuits to control the flow of current or to change the state of a circuit. Here are some common types of switches:


Toggle Switch: A toggle switch is a simple on/off switch that typically consists of a lever or a protruding handle that can be flipped up or down to toggle the circuit between the on and off states. It is commonly used in home appliances, lighting fixtures, and electronic devices.


Push Button Switch: A push button switch is a momentary switch that is activated by pressing a button. It is spring-loaded and returns to its default position when released. Push button switches are commonly found in control panels, machinery, and consumer electronics.


Rocker Switch: A rocker switch has a rectangular or square-shaped lever that rocks back and forth to open or close a circuit. It is commonly used in power switches for household appliances and electronic devices.


Slide Switch: A slide switch consists of a small lever or slider that can be moved horizontally or vertically to open or close a circuit. It is often used in electronic equipment, audio devices, and lighting controls.


Rotary Switch: A rotary switch is a multi-position switch that uses a rotating knob or dial to select between different circuit paths or settings. It has several fixed positions, and turning the knob selects a specific position. Rotary switches are commonly found in audio equipment, instruments, and electrical controls.


DIP Switch: Dual In-line Package (DIP) switches are small switches that are usually mounted on a circuit board. They have a row of tiny toggle switches that can be individually set to on or off positions. DIP switches are commonly used for configuration settings, addressing, or setting options in electronic devices.


Reed Switch: A reed switch consists of two thin metal contacts that are hermetically sealed inside a glass tube. When exposed to a magnetic field, the contacts come together or separate, closing or opening the circuit. Reed switches are used in applications such as proximity sensors, security systems, and magnetic switches.


Pressure Switch: A pressure switch is activated by changes in pressure. When the pressure reaches a specific threshold, the switch opens or closes the circuit. Pressure switches are commonly used in pumps, air compressors, and HVAC systems.


These are just a few examples of switches commonly used in electrical and electronic applications. Each switch type has its own characteristics, functionality, and applications, and they are selected based on the specific requirements of the circuit or device they are used in.


Monday, August 2, 2021

DC And AC voltmeter and ammeter.

Content

             AC and DC voltmeters are electronic devices used to measure voltage in electrical circuits. They differ in their ability to measure either alternating current (AC) or direct current (DC) voltages. Here's a brief explanation of each type:

 DC voltmeter and ac voltmeter DC voltmeter measure the peak value of DC voltage. AC voltmeter measure the RMS value of AC voltage. The DC voltmeter consists of tender followed by a multistage amplifier and a PMMC metre.

AC and DC voltmeter

The instrument which is used to measure the AC voltage across any two points of electric circuit is called AC voltmeter. The aisi v m consists of reactive fire then it is said to be rectifier based AC voltmeter. The DC voltmeter measure only DC voltage.

DC voltmeter.

The series resistance which is used in DC voltmeter is also called series multiplier resistance or simple array multiple. 8 basically limit amount of current that flow through galvanometer in order to prevent the m current from exceeding the full scale deflection value. The circuit diagram of DC voltmeter in show in below figure.

DC voltmeter diagram.

We have to play this DC voltmeter across the two point of an electric circuit, where the DC voltage is to be measured.A DC voltmeter is used to measure the magnitude of direct current voltage, which flows continuously in a single direction without changing polarity. DC voltage is commonly found in batteries, electronic circuits powered by batteries, and some power supplies. DC voltmeters provide readings of the average or steady-state voltage value. They are calibrated to measure DC voltage accurately.

AC voltmeter.

If half wave rectifier is connected a head of DC voltmeter, then that enter combination together is called AC voltmeter using half wave rectifier. The block diagram of AC voltmeter using half wave rectifier is show in below figure.An AC voltmeter is designed to measure the magnitude and sometimes the frequency of alternating current voltage. AC voltage periodically changes in direction and magnitude over time, as found in power distribution systems, home appliances, and electronic devices that operate on AC power. AC voltmeters typically have a scale that displays the root mean square (RMS) voltage value, which represents the effective voltage. They are calibrated to provide accurate measurements of AC voltage.

The RMS value of sinusoidal AC input voltage single phase.



It's important to note that some voltmeters are designed to measure both AC and DC voltage and are referred to as AC/DC voltmeters or multimeters. These versatile instruments allow users to switch between AC and DC voltage measurement modes, making them suitable for a wide range of applications. Multimeters often include additional measurement functions, such as current and resistance measurements, continuity testing, and diode testing.

When using a voltmeter, it is crucial to select the appropriate voltage range based on the expected voltage level to ensure accurate readings and prevent damage to the instrument. Additionally, proper connection to the circuit or device being measured is essential, following the manufacturer's instructions or guidelines for safety and accurate measurements.

AC and DC Ammeter.

DC ammeter

                     Current is the rate of flow of electric charge is this electric charge flow only in one direction then the resultant current is called direct current (DC). The instrument which is used to measure the direct current is called DC ammeter.

DC Ammeter
AC Ammeter.

                         Current is the rate of flow of electric charge if the direction of this electric charge change regularly then the resultant current is called alternating current AC.

                     The instrument which is used to measure the alternating current that flow through only branch of electric circuit is called AC ammeter.

AC Ammeter

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