Tiny, robust useless box!

thingiverse

This build utilizes affordable standard components; design was crafted from scratch with two primary objectives: - Reliable operation => 3mm wall thickness - Easy, fast printing => small overall size, minimal support requirements Components required: - Arduino nano 168, 5V - 9g standard tower servo - 10k resistor - On / off switch, 3A 125V, 5x8 housing - USB cable - Some super glue to attach 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 quickly, Arduino may crash without it due to high peak current requirements; in case needed, just add it in parallel to Servo power cables) - Approximately 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 hold everything inside; it takes some patience, but it works! Power is delivered to the circuit via 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 met; I assembled mine right off the printer - no grinding or drilling. Little demo: https://youtu.be/f6OEhEwtJiM