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Here's one extra step I had to take for my PIR sensor that doesn't have a jumper. I had to dab a little glob of solder to bridge those top two pins (the L pad to the middle pad). Note: during a failed attempt following another example for running this sensor at 3.3v, I ripped off the lower H pad -- ignore that snafu in the attached pic.I've only been running this on 3.3v for a half hour or so, but it seems to be just as sensitive as it was running at 5v, and still shows the same ~3.3v on the OUT pin as before when triggered. No problems so far. Much appreciated!
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