18650 5v USV
thingiverse
This is an extremely cost-effective Uninterruptible Power Supply for Raspberry Pi or other 5-volt devices. The UPS is based on the 18650 Battery Shield V8.3, which features a micro USB connector located opposite the large USB plug. Two variants are available: 1. A simple housing for the battery shield. 2. A housing for the battery shield and a base plate compatible with Raspberry Pi cases, as described in this database: Thing #922740. To assemble the UPS, print the LED.stl file using transparent filament with 100% infill. You will need four M3 countersunk screws and eight M3 bushes (4mm diameter, 5mm long) to secure both case halves together. The two pins inside the cover can be used to connect an ADS1115 sensor, allowing you to log the UPS voltage via the I2C bus.
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