March 16, 2026
Description
Dimensions:
Height: 41mm
Top: ⌀90mm
Bottom: ⌀173mm
Sensor hole: ⌀23
Switch holes: 19,6 x 12,8mm
PSU cable hole: ⌀7mm
Print instructions:
Print in the orientation the model is made
Support is needed for the motion sensor and switch holes
The pin hole is designed, so you don't need supports (you may need to place support blockers)
The instructions for the skull itself can be found on my Version 1
What you need:
Electronics:
Power supply (4.5V/0.5A in my case)
Motion Sensor: HC-SR501
Mosfet: IRLZ44N
Cables
2 LEDs
2 switches
Resistors
glue to fixate the motion sensor
4 small wood screws for the bottom plate (optional)
I got all my electronics very cheap at aliexpress. Except the PSU witch was an old one I just reused.
Circuit diagram:
License:
Creative Commons — Attribution — Noncommercial