In electrical and electronic system, a switch is a device, which can make or break an electrical circuit or we can say that switch is a controlling device, which interrupt the flow of current or direct the flow of current in another direction.
Almost all the electrical and electronics systems contain at least one switch, which is used to make the device ON or OFF. In addition, a switch is used to control the circuit operation and user may able to activate or deactivate the whole or certain parts of the connected circuit.
Generally, Switches can be categories as.
1) Mechanical Switches
2)Electrical/Electronic Switches
Both of these types of switches are widely used in Electrical and Electronics systems. Type of switch selection depends upon the system in which they are going to be incorporated. Switches can also be categories on many different bases.
Switches can also be categories on the basis of holding the current state.
1) Late Switch
The latch switch holds its state whether ON or OFF until the new commands initiated.
2) Momentary Switch
Momentary switch holds the state only when the specific command is presented only.
Mechanical Switches:
Mechanical switch is a switch in which two metal plates touch each other to make a physical contact for the current to flow and separate from each other to interrupt the flow of current. There are many types of Mechanical switches and they are also be categories on the basis of power handling capacity.
The contact material is chosen by keeping in mind that the metal oxides, which produced due to corrosion, are mostly insulator and layers of such oxides on the switch plates will hinder the normal operation of the switch.
Electrical and Electronic Switches:
The Above discussed switches are Mechanical switches and they are user manually operated.
Now, we are going to discuss Electrical switches, which are faster in response than mechanical switches and can be switched automatically by an electronic circuit like microcontroller or microprocessor. They can also be categories on the basis of current and voltage rating like mechanical switches.
There are the most widely used electronic switches
1)Transistor 2) Mosfets 3) Relays
MUST SHARE WITH UR ELECTRICAL FRND'S.....
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