Explorer Hat Rev 0 Charging Light Modification
This modification applies to first generation Explorer Hat boards, shipped April and June.
Some of our first Explorer Hats have a minor problem you should be are of. This page will tell you what the problem is and what your options are to resolve it.
How do I know if my board has the problem?
What is the minor problem with the first Explorer Hats?
We designed the red charging LED to be lit when your battery is charging, and to be off when your battery is full. That's not what's happening on the first set of boards that we shipped out. While annoying, this does not effect the ability to charge a battery or the safety of the product.
Technically speaking, what is the problem?
What is the fix?
The Q3 transistor needs to be removed. This is a transistor that's in the corner of the board. It's a little 3-pin device near the RPi header (you should be able to spot the "Q3" label).
If removing Q3 fixes everything, why is Q3 there to begin with?