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A second-generation model, Ring Doorbell 2, was released in 2017, with updated hardware and a 1080p camera with improved low-light performance, that does not rely solely on Wi-Fi, unlike the original model. [44] The Ring Doorbell Pro interoperates with Amazon Alexa to play prerecorded greetings to visitors and allow visitors to leave a message ...
Ring is slowly expanding to Philips Hue’s territory by releasing its first traditional connected light bulb that works both indoor and outdoor. The Amazon-owned company is also revamping outdoor ...
Solar chargers used to charge a phone directly, rather than by using an internal battery, can damage a phone if the output is not well-controlled, [14] for example by supplying excessive voltage in bright sunlight. In less bright light, although there is electrical output it may be too low to support charging, it will not just charge slower.
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Fixed mount solar chargers are also known as solar panels. These are often connected to the electrical grid via control and interface circuits, whereas portable solar chargers are used off-grid (i.e. cars, boats, or RVs). Although portable solar chargers obtain energy only from the sun, they can charge in low light like at sunset.
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Photodetectors may be used in different configurations. Single sensors may detect overall light levels. A 1-D array of photodetectors, as in a spectrophotometer or a Line scanner, may be used to measure the distribution of light along a line. A 2-D array of photodetectors may be used as an image sensor to form images from the pattern of light ...