I've got a setup where I power RPi, 3G dongle from one power source (USB Hub powered from 5V 2A) and a DC Motor HAT and DC Motors (2 small car mirror motors) from a 12V 2A supply. I checked the motors and they work just fine with the 5V supply (although a bit slower but speed is not a priority, I'd even say that if they run slower I'll have more precise control). I was wondering if the connection scheme below is safe.
If there's too little power I suppose I can switch to more Amps. The purpose of doing that is to get rid of the USB Hub as I'm attempting to miniaturise the solution. Thanks for any advice.