I am working on a piece of wearable electronics, specifically a wristwatch. It needs the basic functionality of the Arduino micro, but I want to run the Arduino and a couple small motors on a LiPo battery.
The Arduino platform is especially unsuited for LiPo, as it needs over 4.5V to reliably run the CPU at the standard 16 MHz speed. LiPo cells make 4.2V max and 3.3V min. I also would like the USB port to only charge the battery (safely), and for the battery to power the computer rather than the USB port power the computer directly. None of this is possible without a lot of hacking on the Micro board with an Xacto knife.
I may not be the only person in the world with this product requirement.
I have designed a similar circuit for one of my Nixie tube wristwatches. I'd be happy to design this Arduino board, if for no other reason than to make my particular project feasible.
Thoughts?