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i need help doing a conversion

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i want to know if there is a way to take an ac motion switch and make it so it works with dc power so that i can have it activate a relay instead of a light


Well-Known Member
They usually use a capacitive reactance supply (ie a capacitor) to provide the few mA DC supply required by the PIR motion sensor.

It should be fairly trivial to convert it to 12v DC use.
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