Lighting – Wiring toggle switch (on/off/on) to PIR motion sensor and led strip

ledlighting

I would like to set this up so the first on position goes through the motion sensor and the second on position would be for just turning the led strip light on and bypass the motion sensor.
When I set this up the motion doesn’t work. Both on’s create a circuit though.
It seems that it may be due to the (-) black wire may be what the PIR uses to cut the circuit.
Does anyone have an idea how to wire this?enter image description here

Best Answer

On the PIR, you are shorting V- in and V- out. Are you positive the documentation says they are bridged together? If so, you can omit one wire. If not, that's half your problem.

Also you are switching the inlet of the PIR, meaning you are severing power to it. PIRs often need to "get a sense of the lay of the land" which they then store and use as a reference for "unoccupied". If they also monitor day/night, it helps them to go through a couple of 24hr cycles to learn what your location's highs and lows are. These units do not have expensive NVRAM: If you sever power, it's like a factory reset.

So supply + and - to the PIR inputs at all times. Put the PIR output on one switch leg, constant power on the other, and to the LED in the middle. Whether you switch + or - should depend on what the PIR switches... check its docs. If you are not sure, get a DPDT and switch both.

enter image description here

If you can confirm that one of those wires is bridged inside the PIR, you can nut them all together, eliminate one of them to the PIR (redundant) and use a single-pole (SPDT) switch.