Right, I’m trying to figure out how to properly power my Arduino Nano with several peripherals: DS3231 rtc, TM1637 display, capacitive touch button w/ LED and - most importantly- a 28BYJ-48 stepper with cheap ULN2003 driver board.
On my breadboard, I power the Arduino via usb and power the clock, display and capacitive sensor through the Arduino. The stepper board is powered via a 5V usb adapter. I tried to share the stepper power with the clock or display, but the voltage drop is too much for them to receive sufficient power. And this is the problem… I want to power the entire project on a single 5V/2A usb adapter.
My initial idea was to split the incoming 5V and supply the stepper and Arduino separately, but with this voltage drop it won’t work. Any other suggestions how to supply it?
Preferably, I want to supply it through a single micro-usb cable from a 5V adapter. As long as the stepper is not running, then I should still be able to communicate to the Arduino via my usb port.