Electronics - Voltage and Current - Discussion
Discussion Forum : Voltage and Current - General Questions (Q.No. 7)
7.
What type of switch is this?
Discussion:
62 comments Page 2 of 7.
Priya said:
1 decade ago
Answer is SPDT.
The basic theory is the moving contact of the switch is known as "Pole" & non-moving contact is known as "throw". So, from symbol we come to know that there is a single pole and double throw. Hence it is SPDT.
The basic theory is the moving contact of the switch is known as "Pole" & non-moving contact is known as "throw". So, from symbol we come to know that there is a single pole and double throw. Hence it is SPDT.
Kranthi said:
1 decade ago
Push button means momentary contact.
Akshat said:
1 decade ago
What is the difference between single pole and double pole?
Ragunath said:
1 decade ago
@Kowsalya.
The "push-button" has been utilized in calculators, push-button telephones, kitchen appliances, and various other mechanical and electronic devices, home and commercial.
In industrial and commercial applications, push buttons can be linked together by a mechanical linkage so that the act of pushing one button causes the other button to be released. In this way, a stop button can "force" a start button to be released. This method of linkage is used in simple manual operations in which the machine or process have no electrical circuits for control.
Pushbuttons are often color-coded to associate them with their function so that the operator will not push the wrong button in error. Commonly used colors are red for stopping the machine or process and green for starting the machine or process.
Red pushbuttons can also have large heads (called mushroom heads) for easy operation and to facilitate the stopping of a machine. These pushbuttons are called emergency stop buttons and are mandated by the electrical code in many jurisdictions for increased safety. This large mushroom shape can also be found in buttons for use with operators who need to wear gloves for their work and could not actuate a regular flush-mounted push button. As an aid for operators and users in industrial or commercial applications, a pilot light is commonly added to draw the attention of the user and to provide feedback if the button is pushed. Typically this light is included into the center of the pushbutton and a lens replaces the pushbutton hard center disk. The source of the energy to illuminate the light is not directly tied to the contacts on the back of the pushbutton but to the action the pushbutton controls. In this way a start button when pushed will cause the process or machine operation to be started and a secondary contact designed into the operation or process will close to turn on the pilot light and signify the action of pushing the button caused the resultant process or action to start.
The "push-button" has been utilized in calculators, push-button telephones, kitchen appliances, and various other mechanical and electronic devices, home and commercial.
In industrial and commercial applications, push buttons can be linked together by a mechanical linkage so that the act of pushing one button causes the other button to be released. In this way, a stop button can "force" a start button to be released. This method of linkage is used in simple manual operations in which the machine or process have no electrical circuits for control.
Pushbuttons are often color-coded to associate them with their function so that the operator will not push the wrong button in error. Commonly used colors are red for stopping the machine or process and green for starting the machine or process.
Red pushbuttons can also have large heads (called mushroom heads) for easy operation and to facilitate the stopping of a machine. These pushbuttons are called emergency stop buttons and are mandated by the electrical code in many jurisdictions for increased safety. This large mushroom shape can also be found in buttons for use with operators who need to wear gloves for their work and could not actuate a regular flush-mounted push button. As an aid for operators and users in industrial or commercial applications, a pilot light is commonly added to draw the attention of the user and to provide feedback if the button is pushed. Typically this light is included into the center of the pushbutton and a lens replaces the pushbutton hard center disk. The source of the energy to illuminate the light is not directly tied to the contacts on the back of the pushbutton but to the action the pushbutton controls. In this way a start button when pushed will cause the process or machine operation to be started and a secondary contact designed into the operation or process will close to turn on the pilot light and signify the action of pushing the button caused the resultant process or action to start.
Suresh p said:
1 decade ago
What is the push button?
Asha said:
1 decade ago
Push button is an electrical switch operated by pressing a button, which closes or opens the circuit; i.e.; it connect or disconnects.
Jaw said:
1 decade ago
Single pole double throw - SPDT.
Double pole double throw - DPDT.
Double pole double throw - DPDT.
Naim said:
1 decade ago
What type of symbol for (DPDT, SPDT, push button, DPST) ?
Vivek raj said:
1 decade ago
Can anyone provide me with the examples of DPDT and DPST ?
TV NARAYANA REDDY said:
1 decade ago
Can anyone provide real time examples for this?
Post your comments here:
Quick links
Quantitative Aptitude
Verbal (English)
Reasoning
Programming
Interview
Placement Papers