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:
“So all that is said of the wise man by Stoic or Oriental or modern essayist, describes to each reader his own idea, describes his unattained but attainable self.”
—Ralph Waldo Emerson (1803–1882)
“In my practice I’ve seen how people have allowed their humanity to drain away. Only it happens slowly instead of all at once. I didn’t seem to mind.... All of us, a little bit. We harden our hearts. Grow callous. Only when we have to fight to stay human do we realize how precious it is to us, how dear.”
—Daniel Mainwaring (1902–1977)