Driving two stepper motors and mcu using only one source

I need help for a school project

I'm trying to drive two bipolar stepper motors using two DRV8833 double h-bridge and an atmega328p mcu (with arduino bootloader)

Unfortunatly, I am restricted to using two AA batteries,

The stepper motors actually draw 1Amp per phase, so it does a lot of noise and my mcu keeps reseting, even with a regulated source

I actually have no problems driving the motors with the batteries as long as the mcu has a seperate source

I was looking for a way to have a clean voltage for my mcu, perhaps some kind of isolator thath would act as an impedance to the batteries and generate a new regulated source for the mcu

i also thought about using the 2 batteries as two seperate sources along with step-ups, but i doubt drawing up to 3-4 amps from a single AA batterie would work

have you tried temporarily using a larger source (ex. a dc power supply from your laboratory)? You did mention using a regulated source, but i'm not sure what you mean (a larger regulated source or simply a voltage regulator?). I think using 2 AA batteries (so 3 volts?) is quite a restriction for something which has 2 stepper motors and an mcu :-| i was thinking maybe a 9 volt battery and a 5v voltage regulator for the MCU might work, but maybe you can't go with that. maybe a small transistor based voltage regulator for the mcu might work, good luck!