18650 battery power board
franz-unix last edited by
Hi, to power a sensor or actuator with a 18650 li-ion battery I have designed this pcb based on a tp4056 module and MT3608 booster.
- Load sharing circuit to safely power the load while charging the battery
Boost converter MT3608 (optional) to increase the output voltage. To reduce the size of the board the right part delimited by the vertical white line can be cut out
Charging status signaling led (optional)
- Voltage dividers (optional) to measure Vin - V batt - V boost - V standby. Output available through J4
- Battery reverse polarity protection through mosfet Q4, excludable through jumper JP3
- Battery voltage measure point can be selected through jumper JP2
This board can be used with this one
I have ordered it (JLCPCB) but yet tested. After that if someone is interested I can share it through openhardware.
Any suggestion / improvement / comment is well appreciated.