I'd like a single power source for the whole
Ideally a barrel jack.
I'd like to then take the 9v VCC1 and GND as an input to the LM2596, with the adjuster set to 5v output. These 5v outputs, VCC/GND, would then power the rest of the circuit including the nano (via pin 27).
Is this approach viable?
I'm concerned that current drawn from the motor upstream of the LM2596 will mess with the 5v output.
e.g. if I set it to 12v and the motor pulls 2A from its own 9v LM2596 module, will that leave the arduino circuit on the 5v LM2596 underpowered?
Start collecting old wall warts from electronic kit that's being thrown away, they come in handy, I have loads of them in my loft!