Generate a perfectly fitted, 3D-printable case for your Generic HC-SR501 PIR Motion Sensor. Verified 32x24mm base dimensions with The Fresnel dome lens adds ~15mm above the PCB (total ~25mm).
PIR sensor draws ~65µA quiescent / 65mA active — no thermal management needed. Primary enclosure concern is preserving the Fresnel lens's optical field and avoiding convective air currents that would trigger false detection.
PLA works for protected indoor installations. PETG handles semi-outdoor mounting where UV degrades PLA over months. ABS is the choice for permanent outdoor deployment where temperature cycling matters.
Fresnel lens must NOT be obscured — even window film reduces PIR sensitivity by 30-50%.
Sensitivity and delay pots are user-tunable; leave the pot faces accessible OR tune them before final enclosure seal.
Jumper selects retriggering mode (H/L); set before sealing or provide access to it.
PIR is sensitive to HVAC drafts and direct sunlight — consider the lens pointing direction carefully to avoid false positives.
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Mechanical properties are estimates. Validate critical loads before use.