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2. Digital clock - Wikipedia

   en.wikipedia.org/wiki/Digital_clock

   This digital clock has been attached to an oven. This digital clock reacts to temperature. Because digital clocks can be very small and inexpensive devices that enhance the popularity of product designs, they are often incorporated into all kinds of devices such as cars, radios, televisions, microwave ovens, standard ovens, computers and cell ...

3. Quartz clock - Wikipedia

   en.wikipedia.org/wiki/Quartz_clock

   In most clocks, the resonator is in a small cylindrical or flat package, about 4 mm to 6 mm long. [6] The 32 768 Hz resonator has become so common due to a compromise between the large physical size of low-frequency crystals for watches and the larger current drain of high-frequency crystals, which reduces the life of the watch battery .

4. Pin-pallet escapement - Wikipedia

   en.wikipedia.org/wiki/Pin-pallet_escapement

   A Roskopf, pin-lever, or pin-pallet escapement is an inexpensive, less accurate version of the lever escapement, used in mechanical alarm clocks, kitchen timers, mantel clocks and, until the 1970s, cheap watches now known as pin lever watches. It was popularized by German watchmaker Georges Frederic Roskopf in its "proletarian watch" from 1867 ...

5. Pendulum clock - Wikipedia

   en.wikipedia.org/wiki/Pendulum_clock

   A pendulum clock is a clock that uses a pendulum, a swinging weight, as its timekeeping element. The advantage of a pendulum for timekeeping is that it is an approximate harmonic oscillator: It swings back and forth in a precise time interval dependent on its length, and resists swinging at other rates.

6. 10 Old Tech Gadgets Worth a Pretty Penny Today

   www.aol.com/10-old-tech-gadgets-worth-140005518.html

   Hailing from Japan, these digital pets were all the craze in the ’90s. By enabling users to care for a virtual pet, the pocket-sized devices mimicked all the responsibilities of real pet ...

7. Sony Dream Machine - Wikipedia

   en.wikipedia.org/wiki/Sony_Dream_Machine

   An FM/AM digital clock radio with a cube dimension of 4.5 inches all around. It was Probably an older generation of CXW family digital radio with more improved features like DREAM BAR on the top panel and a 9-volt battery backup at the bottom panel like C317. It must be the first model in the CXW family with the backup battery feature since it ...