- VIN - The chip can safely run from 3-5VDC. To power the board, give it the same power as the logic level of your microcontroller - e.g. for a 5V microcontroller like Arduino, use 5V
- GND - common ground for power and logic
- SCL - This is the I2C clock pin SCL, connect to your microcontroller's I2C clock line. There's a 10K pullup on this pin.
- SDI - This is the I2C data pin SDA, connect to your microcontroller's I2C data line. There's a 10K pullup on this pin.
- STEMMA QT - These connectors allow you to connect to dev boards with STEMMA QT connectors or to other things with various associated accessories
Theres are two JST ports, they are equivalent. Connect the battery to either one, then the load/charger to the other. Watch out for battery polarity if not using an Adafruit battery!
- INT - Interrupt signal out, you can set this up to pull low when the voltage or percentage drops below a threshold. Pulled up to VIN with a 10K resistor
- Therm - Connect a 10K thermistor to the THERM pin to read the battery pack temperature - our packs do not come with a built in thermistor but many do. The other side of the thermistor goes to ground.