Tiny, robust useless box!

This build uses cheap standard components; design was done from scratch with two main targets:

• robust operation => 3mm wall thickness

• easy, fast printing => small overall size, minimum support requirements Components needed:

• Arduino nano 168, 5V

• 9g standard tower servo
• 10k resistor
• on / off switch, 3A 125V, 5x8 housing
• USB cable
• some super glue to mount printed arm to servo arm
• 4 nuts M3
• 2x M3x12 used as a hinge for the lid
• 2x M3x16 to close the box
• optional: 1000yF electrolytic capacitor (when servo moves fast, Arduino might crash without it due to high peak current requirements; in case needed, just add it in parallel to Servo power cables)

• about 50g of filament at 25% infill Before you ask:
  Schematic and Arduino code were taken from here; no need to reinvent the wheel;-)

  https://www.instructables.com/id/Arduino-Most-Useless-Machine-Ever-project/

  The box will take everything inside; takes some patience, but it works!
  Power is brought to the circuit by a USB cable. I cut it off an old mouse and soldered it directly to Vin of the Arduino.

  Print time in total is a little less than 4 hours on my Anet A8; only the cover will need a little support when printing for the recess of the lid.
  Tolerances are easily meet; I assembled mine right off the printer - no grinding or drilling.

  Little demo:
  

  Print Settings

Printer Brand:

Anet

Printer:

A8

No

Supports:

Yes

0.24

Infill:

25%

Notes:

Supports only needed for cover; touching build plate is sufficient