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| Design of Smart Power Supply for Home Security System
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Wahyudi, Nur Husnina Hanani, Munawar Agus Riyadi
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Abstract:
The National Electricity Company (PLN), which distributes electricity to the Indonesian people, is still their primary source of electricity. However, PLN's electricity can occasionally go out owing to short circuits or recurring maintenance or repairs. When PLN power is lost, home security systems that depend on it may not function properly, making it difficult for the system to detect theft or other threats when they happen. To enable the home security system to function even when the PLN source is off, this study proposes a standalone power supply system using a 12 V/45 Ah accumulator. The accumulator in this paper has a relay voltage breaker that is used to disconnect the charger voltage by using the voltage parameter. When the voltage on the accumulator falls below 11.4 V, the relay will connect to the charger, and when the voltage rises to 12.3 V, it will disconnect the accumulator voltage. The 220 V AC PLN current used by the system to charge the accumulator is lowered to 14.04 V DC, which is the standard voltage. The DC-DC converter module lowers the output voltage from the accumulator to 5.01 V and 9.06 V, which is then used as the primary voltage source for the microcontroller of the home security system.
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