Some of the first discoveries in electromechanical relays
involved pioneering technology of the telegraph system. Designed by
Samuel Morse in 1840, they became a landmark event for the modern
electronics industry. These simple relays repeat and amplify signals and
then transfer, or switch them from the original circuit to another,
over extensive distances. Such basic relays, only on a larger scale,
were the mainstay of the various buildings that housed huge telephone
exchanges in countries around the world. Relays are useful for
performing logical and straightforward actions and especially with the
early computing industry. As with all technology, it is constantly in a
state of development and advances are always being made. Modern
equipment uses a lot more power than the early electronic devices. For
this reason new relay mechanisms helped to cope with increased current
and more complicated tasks.
Electronic circuits that are required to do complex function tasks, rather than the basic on or off command use a switch mechanism known as Solid State Relays (SSR). They use a semi-conductor to do the switching action. However, modern-day power systems use digital components and instrumentation called protective relays to do the job. In schools across the country simple relay mechanisms teach children about electricity. A simple base board (PCB) with either an electromagnetic coil or battery power supply, some contacts and a moveable armature allow the children to create a basic electronic circuit and light up a light bulb affixed to the board. The children then learn how to interrupt the power supply by using the switch mechanism on the relay.
Basic relays are still used in some equipment used to detect faults on transmission lines today. Basic relays can also be used to detect power overloads or system short circuits, and while still in use by some, more people are turning to digital equipment that does the same job faster and more easily. The electronics industry has perhaps advanced faster than any other area of specialty knowledge. Yet, no matter how sweeping the advances or how fast the rate of development, there is still no better way to teach future generations about the way electricity works than by giving them a small PCB and allowing them to build their own electronic relay. Hands on learning like that is invaluable when it comes to making impressions on young children. By seeing how they have built the circuit and then gone on to develop a working switch mechanism, gives a child both an understanding and a respect for this amazing resource, that even industry experts cannot hope to fully understand.
Electronic circuits that are required to do complex function tasks, rather than the basic on or off command use a switch mechanism known as Solid State Relays (SSR). They use a semi-conductor to do the switching action. However, modern-day power systems use digital components and instrumentation called protective relays to do the job. In schools across the country simple relay mechanisms teach children about electricity. A simple base board (PCB) with either an electromagnetic coil or battery power supply, some contacts and a moveable armature allow the children to create a basic electronic circuit and light up a light bulb affixed to the board. The children then learn how to interrupt the power supply by using the switch mechanism on the relay.
Basic relays are still used in some equipment used to detect faults on transmission lines today. Basic relays can also be used to detect power overloads or system short circuits, and while still in use by some, more people are turning to digital equipment that does the same job faster and more easily. The electronics industry has perhaps advanced faster than any other area of specialty knowledge. Yet, no matter how sweeping the advances or how fast the rate of development, there is still no better way to teach future generations about the way electricity works than by giving them a small PCB and allowing them to build their own electronic relay. Hands on learning like that is invaluable when it comes to making impressions on young children. By seeing how they have built the circuit and then gone on to develop a working switch mechanism, gives a child both an understanding and a respect for this amazing resource, that even industry experts cannot hope to fully understand.
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