Modern Practice
Much equipment which for most of the 20th century would have used electromechanical devices for control, beginning from the last third of the century have come to use less expensive and more reliable integrated microcontroller circuits containing ultimately a few million transistors and a program to carry out the same task through logic, with electromechanical components only where moving parts, such as mechanical electric actuators, are a requirement. Such chips have replaced most electromechanical devices, are used in most simple feedback control systems, and appear in huge numbers in everything from traffic lights to washing machines.
Read more about this topic: Electromechanics
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“Primitive times are lyrical, ancient times epical, modern times dramatic. The ode sings of eternity, the epic imparts solemnity to history, the drama depicts life. The characteristic of the first poetry is ingeniousness, of the second, simplicity, of the third, truth.”
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