Halloween Coffin

My favourite electronics blog had a manual to build a shocking halloween toy. Unfortunately, it is made of plywood. But hey, we have 3D printers, lets go!
Took me a lot of hours to make a decent Fusion360 construction, but it is worth it.

The coffin in action:
https://www.youtube.com/shorts/7WrrfCwW81I

Here is a link to the blog article (in german):
https://www.az-delivery.de/blogs/azdelivery-blog-fur-arduino-und-raspberry-pi/halloween-2022-der-suessigkeitenwaechter
There is everything you need - except the 3D parts.

Slicer settings:
Mounting holes of ultrasonic sensor could use supports, but prints also well without. All other parts print without support. Infill 20% "Lightning" works well for all parts. Reducing top-, bottom and wall layers works well, saves filament and time.
See pictures how to place the hinges with superglue.

Microcontrollers Arduino, ESP32, ESP8266, Raspberry Pi all would work.
Sound is optional, I used a DFPlayer module and a speaker.
To run