Vernier excavator
The Vernier Excavator: No More Dead Batteries
A clever, automated solution to the world’s most annoying calipers.
We’ve all been there: you finish a project, carefully tuck your digital calipers back into their case, and accidentally nudge the slide. Because most calipers auto-power on when moved—but don't always power off—you’re greeted by a dead battery the next time you need an accurate measurement.
The Vernier Excavator was born out of that exact frustration. It’s a custom-built docking station designed to ensure your tools are actually off when you walk away.
How It Works
When you place your calipers into the custom holder, the system triggers a motorized "excavator" arm. The arm lowers specifically to press the OFF button, guaranteeing your battery is preserved for your next session.
- Universal Design: The "bucket" position is fully adjustable, making it compatible with a wide range of caliper brands and sizes.
- Set and Forget: Simply dock your tool, and the Arduino-controlled arm handles the rest.
Required parts
(Links to electronic parts in the assembly instructions)
- 1 x arduino nano no pins
- 1 x SG90 servo
- 1 x B103 10k potentiometer
- 1 x slide switch
- 1 x micro lever switch
- 5 M2 x 10mm cap head screws
- 2 M2 x 20mm cap head screws
- Tooth picks - (metal pins can be used if available)
- Hookup wire (i use some cat5 )
- 3 x 10k ohm resistors
- Super glue
- 1mm x 20mm double sided foam tape
