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2. Watchdog timer - Wikipedia

   en.wikipedia.org/wiki/Watchdog_timer

   A watchdog timer (WDT, or simply a watchdog), sometimes called a computer operating properly timer (COP timer), [1] is an electronic or software timer that is used to detect and recover from computer malfunctions. Watchdog timers are widely used in computers to facilitate automatic correction of temporary hardware faults, and to prevent errant ...

3. Reference 57260 - Wikipedia

   en.wikipedia.org/wiki/Reference_57260

   [8] [9] Members of the lineage include James W. Packard's minute repeating pocket watch (1918), which was auctioned for US$1.763 million by Christie's in New York on 15 June 2011, and King Fuad I's pocket watch No. 402833 (1929), which ranks as one of the most expensive watches ever sold at auction, fetching US$2.77 million (3,306,250 CHF) in ...

4. 555 timer IC - Wikipedia

   en.wikipedia.org/wiki/555_timer_IC

   In 1972, Signetics originally released the 555 timer in DIP-8 and TO5-8 metal can packages, and the 556 timer was released in a DIP-14 package. [ 4 ] In 2006, the dual 556 timer was available in through-hole packages as DIP-14 (2.54 mm pitch), [ 21 ] and surface-mount packages as SO-14 (1.27 mm pitch) and SSOP-14 (0.65 mm pitch).

5. WWV (radio station) - Wikipedia

   en.wikipedia.org/wiki/WWV_(radio_station)

   WWV Transmitter Building (2002 or earlier) WWV's 15 MHz antenna WWV is a shortwave ("high frequency" or HF) radio station, located near Fort Collins, Colorado.It has broadcast a continuous time signal since 1945, and implements United States government frequency standards, with transmitters operating on 2.5, 5, 10, 15, 20, and 25 MHz. [1]

6. Ring (company) - Wikipedia

   en.wikipedia.org/wiki/Ring_(company)

   In November 2013, Ring was founded as Doorbot by Jamie Siminoff. Doorbot was crowdfunded via Christie Street, and raised US$ 364,000, more than the $250,000 requested. [1] [4] [5] Siminoff's team envisioned the product's concept as an "alarm system literally turned inside out" in comparison to other security systems, describing it as a "pre-crime" system. [6]

7. Civil defense siren - Wikipedia

   en.wikipedia.org/wiki/Civil_defense_siren

   The outdoor sirens are tested four times a year on the first non-holiday Monday of March, June, September, and December at 15:00 local time. The test consists of the general alarm for 2 minutes, followed by a 90-second gap before the "all clear" is sounded. There are usually around 15 to 20 general alarms, occurring locally, per year.