hello, I have arduino uno, powerbank and led battery graph module, I didnt understood how to use this module, I want to make this module calculate and show power state of powerbank, please help
I didnt understood how to use this module,
Did you click the link on that page? It has an Arduino library, schematics, and everything you'd need in one handy-dandy zip file.
yes i downloaded it and uploaded sketch to my arduino, only showed me how to use leds, but i want to learn how to setup my powerbank voltage for it
You forgot to post the specifications of your "powerbank". What kind of battery is in it? Do you have a connection that bypasses the regulator so you can get the raw battery voltage?
my powerbank is 4000 mah, I dont know how to calculate battery voltage with arduino
You connect Arduino Ground to the negative side of the battery inside the powerbank. You connect the positive side of the battery inside the powerbank to an Arduino analog input pin. If the battery voltage is greater than the Arduino supply voltage or the analog reference voltage you will need a voltage divider to bring the voltage down to a valid range.
ok thanks, I will try