Motion Sensor for Halloween Animatronics – HC-SR501 PIR + PC817 Optocoupler Enclosure #3DThursday #3DPrinting

Shared by tupsyvejle on MakerWorld:

An enclosure for a DIY motion-trigger module aimed at Halloween animatronics. BOM: HC-SR501 PIR motion sensor, Sharp PC817 optocoupler, 9V battery clip (Type T), KCD1 square 2-pin on/off rocker switch, 100Ω resistor, 1× 9V battery. PLA or PETG body (TPU adjusting cap), 20-30% infill, no supports. Two print files, both 0.2mm layer, 6 walls, 25% infill, ~1.4h each. Easy to assemble + wire; wiring diagram in attached photo (verify before connecting). Pure maker/electronics pick for the Adafruit audience building their own animatronic props.

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Every Thursday is #3dthursday here at Adafruit! The DIY 3D printing community has passion and dedication for making solid objects from digital models. Recently, we have noticed electronics projects integrated with 3D printed enclosures, brackets, and sculptures, so each Thursday we celebrate and highlight these bold pioneers!

Have you considered building a 3D project around an Arduino or other microcontroller? How about printing a bracket to mount your Raspberry Pi to the back of your HD monitor? And don’t forget the countless LED projects that are possible when you are modeling your projects in 3D!

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