This basically is a remix of a Jack-o'-lantern which I scaled up to 160% and hollowed out the lid using my favorite free CAD software to have enough space for some electronics and LED lighting.

I think the result looks pretty neat and it was a fun little Halloween project.

Electronics parts I've used:
Boost module:
[https://www.ebay.de/itm/1-2V-zu-5-0V-Mini-DC-DC-Step-Up-Boost-Spannungsregler-Modul-Uin-0-9V-5-0V/351741836790?hash=item51e5727df6:g:ib4AAOSwvP9as-yp](https://www.ebay.de/itm/1-2V-zu-5-0V-Mini-DC-DC-Step-Up-Boost-Spannungsregler-Modul-Uin-0-9V-5-0V/351741836790?hash=item51e5727df6:g:ib4AAOSwvP9as-yp)

Voltage Transformer:
[https://www.ebay.de/itm/1-Stuck-Spannungswandler-f-Blink-Flacker-und-Effekt-LEDs-AC-DC-5-24V-12V/352072992295?hash=item51f92f8627:g:Pa4AAOSwdu9as-zU](https://www.ebay.de/itm/1-Stuck-Spannungswandler-f-Blink-Flacker-und-Effekt-LEDs-AC-DC-5-24V-12V/352072992295?hash=item51f92f8627:g:Pa4AAOSwdu9as-zU)

LEDs:
[https://www.ebay.de/itm/10-Stueck-LED-5mm-RGB-Auto-Regenbogen-langsam-10000mcd-/372143426180](https://www.ebay.de/itm/10-Stueck-LED-5mm-RGB-Auto-Regenbogen-langsam-10000mcd-/372143426180)

Wires:
[https://www.ebay.de/itm/1x-10m-Kabel-Ring-Litze-0-14mm-18-x-0-1mm-BRAUN/350818155605?hash=item51ae643c55:g:ag4AAOSwajVUR0T1](https://www.ebay.de/itm/1x-10m-Kabel-Ring-Litze-0-14mm-18-x-0-1mm-BRAUN/350818155605?hash=item51ae643c55:g:ag4AAOSwajVUR0T1)

Battery clip:
[https://www.amazon.de/Batteriehalter-Knopfzellen-CR2032-2032-%C3%A4hnliches/dp/B07DHV53PG/ref=sr_1_6?__mk_de_DE=%C3%85M%C3%85%C5%BD%C3%95%C3%91&keywords=halter+knopfzelle+cr2032&qid=1570704726&sr=8-6](https://www.amazon.de/Batteriehalter-Knopfzellen-CR2032-2032-%C3%A4hnliches/dp/B07DHV53PG/ref=sr_1_6?__mk_de_DE=%C3%85M%C3%85%C5%BD%C3%95%C3%91&keywords=halter+knopfzelle+cr2032&qid=1570704726&sr=8-6)

Switch:
[https://www.amazon.de/gp/product/B077D9FRGL/ref=ppx_yo_dt_b_asin_title_o03_s00?ie=UTF8&psc=1](https://www.amazon.de/gp/product/B077D9FRGL/ref=ppx_yo_dt_b_asin_title_o03_s00?ie=UTF8&psc=1)

Print instructions

Print settings:

0.2mm layer height
Support: yes
Print speed: 50mm/s
Nozzle: 210°C
Bed: 50°C