Digital Caliper Battery Switch - Metal Body - No Cut
Description
This is my take at fixing the infamous [digital caliper fast battery depletion syndrome](https://bbs.homeshopmachinist.net/forum/general/2014917-battery-life-in-digital-calipers-you-wonder-why-your-battery-dies-so-quick): Turn off your digital caliper after some measurements, store it away, then need it a few month later and discover that the battery is already depleted. Turns out the ON/OFF switch only turns the screen OFF and cheap calipers are bad at saving power. The fix consists in a battery case that holds the LR44 battery and can be screwed over the original battery slot, routing the (+) contact through a physical switch. **Project constraints and goals** - An actual switch that really turns off the caliper - As unobstrusive as possible when using the caliper - No modification to the caliper itself due to its metal body - Easy battery access without needing a screwdriver - Use the same LR44 battery the caliper comes with **Parts needed** - A switch - Front plate size: 20x6mm (or adjust the model to your own) - Magnet wire - 0.3mm (0.5mm should also work) - Solder for making the contact pads
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