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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]
A photo-lab timer, photo interval timer, or darkroom timer is a timer used in photography for timing the process of projecting negatives to photosensitive paper with an enlarger, making photographic prints of them at any scale.
Citizen Eco-Drive Thermo watches were introduced in 1999 and use the temperature difference between the wearer's arm and the surrounding environment as a power source. The rare Eco-Drive Thermo watches use the Seebeck effect to generate thermo electricity that powers the electronic movement and charges the secondary power cell. In the sun or in ...
A typical kitchen timer. A timer or countdown timer is a type of clock that starts from a specified time duration and stops upon reaching 00:00. An example of a simple timer is an hourglass. Commonly, a timer triggers an alarm when it ends. A timer can be implemented through hardware or software.
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In addition to 3-byte JMPL and JSRL instructions which can address the entire address space, 2-byte versions of these instructions, JMP and JSR, can jump within a 4K page. The instruction specifies the low 12 bits, and the high 3 bits of the PC are preserved. (These are intended primarily for models with up to 4K of ROM.)
The act of restarting a watchdog timer is commonly referred to as kicking [a] the watchdog. [3] [4] In electronic watchdogs, kicking is typically done by writing to a watchdog control port or by setting a particular bit in a register. Alternatively, some tightly coupled [b] watchdog timers are kicked by executing a special machine language ...
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