In industry the switch connected to the magnetic contactor of the motor controlling circuit is manually/pushed by the operator and has elasticity i.e. can return to its original position by means of a spring when released is called a pushbutton switch. Push-button switches are used with electric Motor starters, with calling bells, and sometimes as temporary supplies in lamp circuits. When the pushbutton switch is pushed and released, the control circuit is de-energized when it returns to its original position. So latching is done to hold the power.

A timer is a type of time-switching device that controls and controls Electrical circuits and electrical and electronic devices through time setting (on/off). The timer is basically 8-pin. Like other controlling devices the timer has a coil and when this coil is magnetized, the timer works on/off. The timer has 2 common ends and each common end has normally close and normally open options. When the timer is set by time, the timer trips at the end of that time and turns the common is normally closed (on) to open (off) and normally open (off) to close (on). This is how the timer works.

Overload Protection is Protection Against a Running Overcurrent That Would Cause Overheating of The Protected Equipment. Hence, An Overload is Also a Type of Overcurrent flow. Overload Protection Typically Operates on an Inverse Time curve where the Tripping Time Becomes less as the Current Increases. This Overload Protector is an Essential Component for Many Sockets Power Systems. The Top-Quality Overload Protector can Effectively Protect Electrical Products from Power Surges.

Defrost heaters are used to melt ice formations in refrigeration equipment. They are caused by defrosting water, which freezes inside the lower freezing cold room, collecting in trays or defrost lines. For trays, tubular heaters of various designs are installed. To defrost pipes, wire heaters are wrapped around the pipe. Defrost cable heaters are made in two models, with or without self-regulating elements. A defrost heater is used to help ice conformation in the Refrigerator and is controlled by a Thermostat.

Biometrics is a scientific and technological authentication method based on biology and is used in data assurance. Biometrics refers to statistics about humans. Biometrics identification is a widely used identification method in computer science. It is used to monitor an individual. Biometric identifiers identify a person by looking at certain physical characteristics system. Biometric devices convert a person is personal characteristics into a digital code system.

CFL stands for Compact Fluorescent Lamp which is an improved version of tube lights of earlier days. Like tube lights, it is a vacuum glass tube with fluorescent powder coating which is not as long and straight as tube lights but curved/twisted compact, or small in size. Like a tube light, it has electrodes or filaments at both ends. But in this case, instead of a choke, there is an electronic circuit that drives the Compact Fluorescent Lamp. Because the red wave is less in the light of the Tubelight and Compact Fluorescent Lamp, the object looks a little pale or the correct color of the object does not appear.