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Smoke Detector with Visible BatteryLife Display

[Category : - ELECTRONICS]
[Viewed 1549 times]

A smoke detector with an easily-readable battery-life display is an apparatus that visually displays the remaining battery life for a smoke detector through an analog or digital device. The apparatus primarily includes a smoke detector, a battery power indicator, and a reference resistor. The battery power indicator is positioned on the underside of the smoke detector so that a person can look up at the smoke detector mounted on a ceiling and view the battery power indicator. The reference resistor draws a small amount of current from the battery, which allows the battery power indicator to measure the gradual reduction of voltage readings across the reference resistor and consequently determine the remaining battery life, and thus displaying the remaining battery life in the appropriate zone (red, yellow or green).

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