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  2. Citizen Watch - Wikipedia

    en.wikipedia.org/wiki/Citizen_Watch

    Eco-Drive watches use a battery recharged by a solar panel hidden under the watch face. In the rare and discontinued Eco-Drive Duo series, the solar power was supplemented by an automatic quartz power source. One early model, called the Citizen Vitality, used the watch hands to drive a small electric generator, but was discontinued following ...

  3. Quartz clock - Wikipedia

    en.wikipedia.org/wiki/Quartz_clock

    It is also possible for quartz clocks and watches to have their quartz crystal oscillate at a higher frequency than 32 768 (= 2 15) Hz (high frequency quartz movements [4]) and/or generate digital pulses more than once per second, to drive a stepping motor powered second hand at a higher power of 2 than once every second, [5] but the electric ...

  4. Talk:Eco-Drive - Wikipedia

    en.wikipedia.org/wiki/Talk:Eco-Drive

    The Citizen Holdings Co., Ltd. article points out that the Eco-Drive line is a commercially successful product line. Tough always subject to personal points of view one can make a case that this line of mainly light powered watches by a major watch producer can be regarded as a notable product line since the producer stated that it made up 80% ...

  5. Eco-Drive - Wikipedia

    en.wikipedia.org/wiki/Eco-Drive

    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 ...

  6. Watch - Wikipedia

    en.wikipedia.org/wiki/Watch

    The bezel of the watch features raised bumps at each hour mark; after briefly touching the face of the watch, the wearer runs a finger around the bezel clockwise. When the finger reaches the bump indicating the hour, the watch vibrates continuously, and when the finger reaches the bump indicating the minute, the watch vibrates intermittently. [69]

  7. Rhythm Watch - Wikipedia

    en.wikipedia.org/wiki/Rhythm_Watch

    Rhythm Co., Ltd. (リズム株式会社, Rizumu Kabushiki-gaisha) (TYO: 7769), formerly Rhythm Watch until 2020) is a Japanese global corporate group based in Saitama, Japan.

  8. History of timekeeping devices - Wikipedia

    en.wikipedia.org/wiki/History_of_timekeeping_devices

    [16] [note 2] The Romans inherited the sundial from the Greeks. [19] The first sundial in Rome arrived in 264 BC, looted from Catania in Sicily. This sundial offered the innovation of the hours of the "horologium" throughout the day where before the Romans simply split the day into early morning and forenoon (mane and ante merididiem). [20]

  9. Radio clock - Wikipedia

    en.wikipedia.org/wiki/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.