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  2. Casio Wave Ceptor - Wikipedia

    en.wikipedia.org/wiki/Casio_Wave_Ceptor

    The Wave Ceptor series (stylized as WAVE CEPTOR or WaveCeptor) is a line of radio-controlled watches by Casio. Wave Ceptor watches synchronise with radio time signals broadcast by various government time services around the world. These signals transmit the time measured by atomic clocks accurate to one second in millions of years.

  3. Radio clock - Wikipedia

    en.wikipedia.org/wiki/Radio_clock

    Radio clock. A modern LF radio-controlled clock. A radio clock or radio-controlled clock (RCC), and often colloquially (and incorrectly [1]) referred to as an "atomic clock", is a type of quartz clock or watch that is automatically synchronized to a time code transmitted by a radio transmitter connected to a time standard such as an atomic clock.

  4. Chip-scale atomic clock - Wikipedia

    en.wikipedia.org/wiki/Chip-scale_atomic_clock

    A chip scale atomic clock (CSAC) is a compact, low-power atomic clock fabricated using techniques of microelectromechanical systems (MEMS) and incorporating a low-power semiconductor laser as the light source. The first CSAC physics package was demonstrated at the National Institute of Standards and Technology (NIST) in 2003, [1] based on an ...

  5. Atomic clock - Wikipedia

    en.wikipedia.org/wiki/Atomic_clock

    Time standards. [edit] An atomic clock is based on a system of atoms which may be in one of two possible energy states. A group of atoms in one state is prepared, then subjected to microwave radiation. If the radiation is of the correct frequency, a number of atoms will transition to the other energy state.

  6. Casio F-91W - Wikipedia

    en.wikipedia.org/wiki/Casio_F-91W

    Digital. Introduced. June 1989 [1] The Casio F-91W is a digital watch manufactured by Japanese electronics company Casio. Introduced in June 1989 [1] as a successor of the F-87W, [2] it is popular for its low price and long battery life. [3] As of 2011, annual production of the watch is 3 million units, which makes it the most sold watch in the ...

  7. List of Arduino boards and compatible systems - Wikipedia

    en.wikipedia.org/wiki/List_of_Arduino_boards_and...

    Battery Monitor; DS3231 Real Time Clock and Temperature sensor, clock backup powered by LiPo battery; On/Off switch. With the switch in Off position the solar charge circuit is still active and the RTC clock is still powered. ICSP programming header; Sparrow [205] ATmega328P Open Home Automation