Input Switch Voltage Control

  • Is it possible to set the input switch (SW) on a Shelly 1 so it only closes when full voltage (i.e. Live) is received, rather than on both neutral and live?

    I understand that most Shelly units are set to 1/2 the input supply voltage to allow for neutral push-button action of the switch (Technical details on Switch input).

    The use case is a bathroom extractor fan connected to a heat lamp circuit. The switch is wired so that if the heat lamp is on, so is the bathroom fan. The fan is also individually switched.

    When wired with both switches off the input SW of the Shelly 1 closes on the N input from the light. (See attachment).

    Open to alternate wiring suggestions as well.

  • Please have a look at this: Click! More Links in the Thread… Unfortunately, it is written in German language. But you may use a translator app…

    „Habt Geduld. Alle Dinge sind schwierig, bevor sie einfach werden!“ (aus Frankreich)

    „Nothing in life is to be feared, it is only to be understood.“ (Marie Curie, 1867-1934)

    „Es reicht nicht“, rief Schiller, „Gedankenfreiheit zu fordern, man muß auch denken können, sonst fordert man Gedankenlosigkeitsfreiheit und die ist die Freiheit zur Dummheit, welche wiederum die schlimmste Unfreiheit überhaupt ist!“
    (Aus „Besuch aus Weimar“ von Gert Heidenreich, Schriftsteller, *1944 in Eberswalde)