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
Famous quotes containing the words modern and/or practice:
“The opera isnt over till the fat lady sings.”
—Anonymous.
A modern proverb along the lines of dont count your chickens before theyre hatched. This form of words has no precise origin, though both Bartletts Familiar Quotations (16th ed., 1992)
“Kindness is a virtue neither modern nor urban. One almost unlearns it in a city. Towns have their own beatitude; they are not unfriendly; they offer a vast and solacing anonymity or an equally vast and solacing gregariousness. But one needs a neighbor on whom to practice compassion.”
—Phyllis McGinley (19051978)