I have a project which is all powered by an Arduino, and have a 9v power supply to the the Vin pin, then a jumper from the 5v pin to a breadboard which has x3 5v boards attached.
I wondered if I could use a volatge regulator on the breadboard to convert the 9v to 5v and then have a wire from the breadboard to the 5v pin on the arduino.
The project is in a box with a barrel connector at the back, then GND and Vcc wires going to the arduino GND and Vin pins.
I don't want to overheat the arduinos regulator, and that is why I want to know if I could use a separate regulator.
Is this doable, and if not what is the best way to power the project and arduino.