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Mains electricity question...

Discussion in 'General Electronics Discussion' started by bfreeman, Sep 12, 2018.

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  1. bfreeman


    Sep 12, 2018
    First time poster. Doing a DIY project building open cupboards with lights inside. I am trying to have the lights EITHER switched from a single wall switch whereby they will all come on OR an individual light only coming on from a mini PIR sensor. See the diagram attached. At the moment, if I was to wire it up, all of the lights would come on from either the switch or any of the PIR sensors. If it was DC I would put a diode between each LED driver and the switch but this is running on 220V AC. Is there any way to get it working how I want? I could put a separate LED driver in each branch but that is quite an expensive way of doing things.
  2. Hopup


    Jul 5, 2015
    You could probably do it with microcontroller and some relays with ease.
  3. kellys_eye


    Jun 25, 2010
    I recall seeing some PIR lights that have the ability to come fully 'on' by flicking the mains switch on/off (twice) otherwise they work as ordinary PIR controlled lights.

    Maybe have a look for the operating instructions of the PIRs you have in mind - they may already have this facility.
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