Hi Folks.
A newbie here who just received his Huzzah Feather. I'll be using it on a breadboard that has a 3.3V power supply, but I can't see a way to power the feather via pins rather than via USB. Am I wrong?
Thanks.
MeDroogie
Hi Folks.
A newbie here who just received his Huzzah Feather. I'll be using it on a breadboard that has a 3.3V power supply, but I can't see a way to power the feather via pins rather than via USB. Am I wrong?
Thanks.
MeDroogie
Looks like it will run from 3.7V battery, and recharge the battery when USB is available.
Several pages in:
Alternative Power Options
The two primary ways for powering a feather are a 3.7/4.2V LiPo battery plugged into the JST port or a USB power cable.
If you need other ways to power the Feather, here's what we recommend:
- For permanent installations, a 5V 1A USB wall adapter will let you plug in a USB cable for reliable power
- For mobile use, where you don't want a LiPoly, use a USB battery pack!
- If you have a higher voltage power supply, [use a 5V buck converter](http://"Search Results for '5V' on Adafruit Industries buck") and wire it to a USB cable's 5V and GND input
Quote
Here's what you cannot do:
- Do not use alkaline or NiMH batteries and connect to the battery port - this will destroy the LiPoly charger and there's no way to disable the charger
- Do not use 7.4V RC batteries on the battery port - this will destroy the board
The Feather is not designed for external power supplies - this is a design decision to make the board compact and low cost. It is not recommended, but technically possible:
- Connect an external 3.3V power supply to the 3V and GND pins. Not recommended, this may cause unexpected behavior and the EN pin will no longer. Also this doesn't provide power on BAT or USB and some Feathers/Wings use those pins for high current usages. You may end up damaging your Feather.
- Connect an external 5V power supply to the USB and GND pins. Not recommended, this may cause unexpected behavior when plugging in the USB port because you will be back-powering the USB port, which could confuse or damage your computer.