An open source USB C battery charger for LIR2450 Li-Ion coin cells.
This repo hosts the KiCad project for the charger, which contains the schematic and printed circuit board layout so you can make your own.
- It uses Microchip's MCP73831 as the charge management controller
- 45mA charge current
The KiCad exported BOM is here.
The hardware and associated design files are released under the Creative Commons CC BY-SA 4.0 license.