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Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
@MobiTech
Do you think that I could solder it also directly to the NRF51822 BLE module instead of the MDBT42Q?
Here is the schematic: https://learn.adafruit.com/assets/17043
Here is the datasheet: https://cdn-shop.adafruit.com/datasheets/MCP73831.pdf
The voltage range would be lower (Wide supply voltage range (1.8V to 3.6V)). Does such a charger have a voltage regulator?