Lampu kamar mandi sering lupa dimatikan, biasanya merasa enggan mematikan karena tangan basah. Memang perlu hati-hati terhadap listrik jika tangan basah. ini solusinya, membuat lampu otomatis kamar mandi, pada saat pintu ditutup akan menyala sendiri dan pada saat pintu dibuka lampu akan mati sendiri. Lampu otomatis kamar mandi ini juga dapat menghemat listrik karena pada saat kamar mandi tidak digunakan maka lampu akan mati. Hanya bermodalkan saklar bel pintu, tidak perlu limit switch apa lagi sensor gerak atau moving detector.
The bathroom light is often forgotten to be turned off, usually people are reluctant to turn it off because their hands are wet. You do need to be careful with electricity if your hands are wet. This is the solution, make the bathroom lights automatic, when the door is closed it will turn on by itself and when the door is opened the light will turn itself off. This automatic bathroom light can also save electricity because when the bathroom is not in use the light will turn off. You only need a doorbell switch, no need for a limit switch, let alone a motion sensor or moving detector.

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