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Jump toMost PopularBest OverallBest BudgetBuying Guide View on Amazon See also onAmazon. co. caMost Popular Smoke Detector First Alert SA320CN Double Sensor 5/5 Product RatingThe First Alert SA320CN Double Battery Powered smoke detector provides dual protection against fires. The ionized and photo electric smoke detectors provide an early warning for any potential fires. This technology also reduces false alarms by sensing real danger. Not all fires are alike. Some fires, like kitchen fires create fast flames and are detected best by the ionization technology. Other fires like cigarettes can smolder in a couch for several hours before erupting into flames. In these cases, residents can die from smoke inhalation before flames ever break out. The photoelectric sensor does the best job in detecting smoldering fires. The First Alert SA320CN Double Battery Powered smoke detector has a loud alarm so it can be heard throughout the house and responded to quickly.

 

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In some implementations, the image sensor array 1114 and/or the image processor of the sensor board 1108 is thermally coupled to a heat spreader 1138 that is disposed under the image sensor array 1114 and configured for dissipating heat generated while images are being captured and processed. The sensor board 1108 may include one or more of a power supply connector 11082, an AC DC converter 11084, a voltage regulator 11086 and a power unit 11088. The power supply connector 11082 is electrically coupled to the plurality of wire terminals 720, and configured to receive an external power supply. The AC DC converter 11084 is coupled to the power supply connector 11082 and configured to generate one or more DC supply voltages to drive various electronic components of the doorbell camera 106. The voltage regulator 11086 is configured to regulate the one or more DC supply voltages to one or more internal supply voltages as needed. The power unit 11088 is coupled to the image sensor array 1114 and/or the image processor to provide power therefor.