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How many volts should a switch have?
A switch can be rated for AC voltage, DC voltage or both having different values and ampacity. For example, a switch can be rated for 240V AC, 230V AC, 15 Amps, 120V DC, 20A etc.
Can you use a 120v switch on 12v?
The insulation in the 12V switch is not designed to withstand 120V (really 170V). No. You can’t use that switch. The switch would heat up a lot and sometimes can cause an electric shock if you touch it.
Can I use a 120V toggle switch for 12V?
How is a transistor used in a solid state switch?
Solid state switches are one of the main applications for the use of transistor to switch a DC output “ON” or “OFF”. Some output devices, such as LED’s only require a few milliamps at logic level DC voltages and can therefore be driven directly by the output of a logic gate.
How does a Darlington transistor work as a switch?
Darlington Transistors simply contain two individual bipolar NPN or PNP type transistors connected together so that the current gain of the first transistor is multiplied with that of the current gain of the second transistor to produce a device which acts like a single transistor with a very high current gain for a much smaller Base current.
What’s the difference between a transistor and a NPN switch?
The equations for calculating the Base resistance, Collector current and voltages are exactly the same as for the previous NPN transistor switch. The difference this time is that we are switching power with a PNP transistor (sourcing current) instead of switching ground with an NPN transistor (sinking current).
What are the different types of mechanical switches?
Mechanical Switches. 1 Single Pole Single Throw Switch (SPST) This is the basic ON and OFF switch consisting of one input contact and one output contact. 2 Single Pole Double Throw Switch (SPDT) 3 Double Pole Single Throw Switch (DPST) 4 Double Pole Double Throw Switch (DPDT) 5 Push Button Switch.