I have a PIR-actived outdoor courtesy light. The PIR and the lantern's lamp bulb are both inside the same single housing. This runs off the mains (UK 240 volts). This is it:
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However I can only work with the mains supply because the PIR and the lamp bulb are effectively one inseperable unit and also are not easy to access.
Can I interrupt the 3 core mains supply to the lantern as a whole and insert a device in SERIES (either in the neutral or in the live lead)such that when the PIR fires and circuit is closed then this device would actuate?
The impedance of the device woul dhave to be modest or it would draw power from the PIR circuit and from the bulb circuit causing both to potentially work wrongly.
Are there any device which would work in this setup? In the old days maybe a relay would have been inserted in-line with one of the mains supply wires and the relay's contact would actuate a device. Mayeb there is there *simple* modern equivalent of the realy which can be used if I can't wire a sounder or a bulb stright in?