useless box

This useless box is of little use but still a lot of fun. It can be printed without supports. The text has to be cut on 0.6mm height (see image of prusa slicer). Each letter has to be applied on the housing. The hinge should be cleared with a 2mm drill. All files can be found on the free onshape cloud:
https://cad.onshape.com/documents/663ff22199e3735c80f312eb/w/943c91484a32ff562dce8c2c/e/2366bdab20ad3eff99731571

The PCB image can be used as assembly print. I applied it as a sticker on the pcb.
The battery has 550mAh while the servo consumes 200mA in operation. Standby current is below 0.01uA!

Partlist:
1 Arduino nano
1 Switch 10-48 UNS ON-ON
1 Relay HE751A0510
1 Diode 1N4148 D1
1 Resistor 2k2 R1
1 RC Servo Hitec HS-81
1 Battery 9V 6LR61
1 Battery cable
1 Laboratory Card FR2 710-5
3 Screw M4x8 (head D=6mm!)
2 Rubber band D=30mm
1 Filament 50x1.75mm for hinge

https://youtu.be/ILTIHh4NFYU