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A time switch (also called a timer switch, or simply timer) is a device that operates an electric switch controlled by a timer. Intermatic introduced its first time switch in 1945, which was used for "electric signs, store window lighting, apartment hall lights, stokers, and oil and gas burners." A consumer version was added in 1952. [1]
On June 10, 2008, HP unveiled their new HP TouchSmart IQ500 series. The series featured a 22-inch widescreen touchscreen display, an Intel Core 2 Duo processor, a 500GB disk, 256MB NVIDIA GeForce 9300 M HS HD graphics, and 802.11n WiFi, along with an Energy Star qualification. [4] The new TouchSmart featured a 2-inch profile in a piano-black ...
Telechron—now the "Clock and Timer Division" of GE—declined in the 1950s, mainly because batteries had become much more long-lived and reliable. Battery-powered clocks have the obvious advantage of not depending on the proximity of a power outlet, and do not require the often somewhat unattractive electric cable.
Digital clocks typically use the 50 or 60 hertz oscillation of AC power or a 32,768 hertz crystal oscillator as in a quartz clock to keep time. Most digital clocks display the hour of the day in 24-hour format; in the United States and a few other countries, a commonly used hour sequence option is 12-hour format (with some indication of AM or PM).
Dallas Semiconductor DS1287 real-time clock manufactured in 1988 Types of hobbyist RTC modules commercially available from China. A real-time clock (RTC) is an electronic device (most often in the form of an integrated circuit) that measures the passage of time.
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