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A clock radio with three green dimmable backlit displays, one main display and two separate alarm displays. It has a white plastic body and silver blue faceplate, a PLL synthesized AM/FM tuner with five preset buttons, two alarms with either radio, beeper, or two selectable melodies as wake up chimes, and a nap button. It has no battery backup.
A backup battery provides power to a system when the primary source of power is unavailable. Backup batteries range from small single cells to retain clock time and date in computers, up to large battery room facilities that power uninterruptible power supply systems for large data centers.
40 hours on two AAA batteries, Lithium CR2032 for backup memory and clock 40 hours on two AA batteries, Lithium CR2032 battery for memory and clock Physical dimensions / weight 122mm × 74mm × 24mm, 130 grams (0.29 lb) 130mm × 80mm × 30mm, 145 grams (0.320 lb) 126mm × 74mm × 30mm, 120 grams (0.26 lb) without battery
The board can also run from a standard power supply and use the battery as backup. Additionally it can be upgraded to include a RTC chip or a high-voltage LDO. On field tests the Whisper Node was able to communicate on distances over 1 km line-of-sight and can run for years on battery, making a great platform for remote sensing and IoT ...
The motor side of the unit in case Nos. 2 and 3 can be driven directly by an AC power source (typically when in inverter bypass), a 6-step double-conversion motor drive, or a 6-pulse inverter. Case No. 1 uses an integrated flywheel as a short-term energy source instead of batteries to allow time for external, electrically coupled gensets to ...
Standby power may be used to power a display, operate a clock, etc., without switching the equipment to full power. Battery-powered equipment connected to mains electricity can be kept fully charged although switched on; for example, a mobile telephone can be ready to receive calls without depleting its battery charge.
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Lavet-type stepping motor of a quartz clock. A black rotor sprocket provides the mechanical output. The Lavet-type stepping motor has widespread use as a drive in electro-mechanical clocks [1] and is a special kind of single-phase stepping motor. Both analog and stepped-movement quartz clocks use the Lavet-type stepping motor (see Quartz clock).