I have an autonomous boat project that amongst many other systems, uses an OLA for some logging. My power system on the boat consists of three independent 12.8v LiFePo4 batteries that will each be driving a 5v/8A regulator (so three independent batteries + reg systems), that will then be diode OR'd and powering various sub-systems. So the output of that power system will be somewhere between 4.3 and 4.7vDC depending on the diodes I use to do the OR'ing.
Now my question is, can you see any issue with me powering my OLA by connecting that 4.3-4.7vDC to its Vin pin? My theory is that its high enough to drive the OLA's onboard v3.3reg but low enough that it should not backfeed a USB computer port if I plug a USB cable in to configure it.
I have read and re-read https://learn.sparkfun.com/tutorials/op ... -guide/all and also looked at the schematic and I think I'm on the right track.
What do you think? Am I missing something?