Hi everyone,
i'm using a 12V alcaline battery as supply for my Arduino Nano.
I need to display on a LCD the battery level but i don't know how to do this because i don't know about batteries.
Can i just measure the voltage of the battery? (i know that i have to use a divider in order do decrease 12V to 5)
The voltage could be an indicator of the battery level?
Thank you!
Search google for an Arduino voltage sensor. they are usually very little $ and have a voltage divider built in. Then you can search for an Arduino routine and will have plenty of options.
Don't hook your battery directly to eh Arduino, as it will probaly create a nice (not) plume of smoke.
The voltage could be an indicator of the battery level?
An indicator, yes. Depending on the battery type, not necessary a very good indicator of how much longer the battery will be able to power the device.
There is another good indicator that i could evaluate using directly arduino?
LTarduino:
There is another good indicator that i could evaluate using directly arduino?
For any given battery type, for any meaning of "battery level", no.
You need to be explicit regarding what you are trying to accomplish.