HC-SR501 PIR Sensor Compact Enclosure

thingiverse

Latching PCB and backlid. If 3-pin header is used for connection, it needs to be bent to fit (photo), alternatively solder wires directly to PCB. If electrolytic capacitors are interfering with corner latches, caps need to be gently bent out of the way (photo). In case you are wondering about the black lense, its just permanent marker. Originally I wanted to limit sensor's field of view by painting portion of lense, but did not work and sensor was still sensitive in covered areas, so I painted entire lens with marker to match box color and will limit FOV some other way. Perhaps more opaque paint will work, did not try yet. I am not sure if there is multiple versions of this sensor, but its easy to customize, just set dimensions in the top of SCAD file, add 2x nozzle diameter to each dimension. My sensors are 32.4x24.4 and 22.9mm diameter lens, but found out inner dimensions need to be slightly expanded otherwise they will not fit. Using Cura 4.4.0, perhaps other slicer is more accurate for inner dimensions, for example designed opening for lens is 23.8mm but printed measures only 23.2mm. I am very new to 3D modelling, just found OpenSCAD few days ago and this is my first design.