USB / DC / Solar Lithium Ion/Polymer Charger
Multi-source LiPoly charger accepting USB, DC barrel, or solar panel input. Designed for outdoor and solar-powered projects; see the bq24074-based Universal version for wider compatibility.
Pinout
- BATT
2-pin JST battery port for a single 3.7V/4.2V lithium-ion or lithium-polymer battery, as stated by Adafruit guide/product text
Type · PowerVoltage · 3.7V nominal / 4.2V charge battery connection - LOAD
load output port for powering another project while the charger shares input power and battery power
Type · PowerVoltage · battery/load rail for 3.7V LiPo system; guide states project can be powered from LOAD output - USB
USB mini-B charging power input; guide states charging can use a USB mini-B cable
Type · USBVoltage · 5V USB input - DCSOLAR
DC jack / solar-panel input for charging; guide states charge with 5-6V DC or 6V solar panel
Type · PowerVoltage · 5-6V DC input; 6V solar panel recommended - CHRG
low-battery/status LED output labelled CHRG per Adafruit guide text
Type · UnknownVoltage · low battery indicator fixed at 3.1V per guide text
| Pin | Type | Function | Voltage |
|---|---|---|---|
| BATT | Power | 2-pin JST battery port for a single 3.7V/4.2V lithium-ion or lithium-polymer battery, as stated by Adafruit guide/product text | 3.7V nominal / 4.2V charge battery connection |
| LOAD | Power | load output port for powering another project while the charger shares input power and battery power | battery/load rail for 3.7V LiPo system; guide states project can be powered from LOAD output |
| USB | USB | USB mini-B charging power input; guide states charging can use a USB mini-B cable | 5V USB input |
| DCSOLAR | Power | DC jack / solar-panel input for charging; guide states charge with 5-6V DC or 6V solar panel | 5-6V DC input; 6V solar panel recommended |
| CHRG | Unknown | low-battery/status LED output labelled CHRG per Adafruit guide text | low battery indicator fixed at 3.1V per guide text |
Pin details
5 connections- BATT
2-pin JST battery port for a single 3.7V/4.2V lithium-ion or lithium-polymer battery, as stated by Adafruit guide/product text
PowerVoltage · 3.7V nominal / 4.2V charge battery connection - LOAD
load output port for powering another project while the charger shares input power and battery power
PowerVoltage · battery/load rail for 3.7V LiPo system; guide states project can be powered from LOAD output - USB
USB mini-B charging power input; guide states charging can use a USB mini-B cable
USBVoltage · 5V USB input - DCSOLAR
DC jack / solar-panel input for charging; guide states charge with 5-6V DC or 6V solar panel
PowerVoltage · 5-6V DC input; 6V solar panel recommended - CHRG
low-battery/status LED output labelled CHRG per Adafruit guide text
UnknownVoltage · low battery indicator fixed at 3.1V per guide text
Start wiring
I2C · USB · 5 V · Module
Verify supply voltage and logic levels before powering up.
Module pins: BATT. Schematik maps them to your board in the app.
Charging
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