Hmm. Thing is, with these add-ons that try to do everything, I find there is always at least one thing that doesn't meet the requirement. For example, my robot runs off a 12V SLA, with 12V-5V buck module, 4-channel relay board to switch power to motors and stuff, and uses a resistor divider to check battery state via GPIO. So [*]in theory[*] this board should be ideal. But:
- 2.1A is enough for the Pi but not much else, so I'd still need separate supply for the motors & servos.
- As far as I can see, it doesn't provide any feedback to the Pi, which is a big problem. It''s no use for soft shutdowns or applications that need to manage power in software, or check battery voltage when the load is at a known state.
- The 3.3V supply is just the Pi's 3.3V supply, so what's the board adding?
- The measurement range of 9-12.5V in "roughly" 0.5V increments seems too vague. For a lead-acid battery, the difference between healthy and almost dead is less than 1V.
- If it's simply measuring voltage, then how does it cope with variations in load caused by those 10A relays switching 10A loads? Presumably the dip would simply shut everythng off and kill the Pi, even though there might be hours worth of Pi power left?
More words might help to allievate some of these concerns, but it seems a little bit too geared towards a specific application.
Submarine communication systems engineer and amateur robot enthusiast.