Datasheet

If you need the DC power for something else, you can also connect to the DC input via the

0.1" breakout. While you can feed power into the breakout pins as well, it's not polarity

protected so make sure you use a schottky diode or just be really careful.

Indicator LEDs

There are three status LEDs on the charger, which you'll find very handy!

The red PWR LED indicates that there is good power connected to the charger. If this LED

is not lit, something is wrong with the power supply

The orange CHRG LED indicates current charging status. When this LED is lit, the charger

is working to charge up a battery! It also acts as a low battery indicator (fixed at 3.1V) when

no power is connected. So, if you don't have USB/Solar wired up, when the battery voltage

drops below 3.1V, the orange LED will come on.

The green DONE LED is pretty easy to understand as well - when it's lit the battery is

charged up! Very handy for when you want to know that everything is done.

If you need to connect larger LEDs or a microcontroller up to these status pins, you can us

the STATUS 0.1" breakout on the bottom edge of the PCB. The pins are open drain, so

they will short to ground when 'active' and float when 'inactive' - you'll want to use a pullup

resistor if you need a digital signal or connect LEDs just like shown below on the schematic,

if you want bigger lights.