23mm x 27mm PIR Case

thingiverse

A tiny 23mm x 27mm enclosure will be needed to cradle these compact PIR sensors: https://www.amazon.com/gp/product/B00FDPO9B8/ref=oh_aui_search_detailpage?ie=UTF8&psc=1 Typically, you'll want to set the jumper to the H position so that the PIR is constantly retriggered. This keeps it high as long as motion is being detected. My InMoov robot can now identify carbon-based lifeforms both in front of and behind it. To secure each sensor firmly in place, I applied a small amount of hot glue to the inside of the box on each shoulder, then gently pressed the PIR into position.