I am currently working on my own beginner’s project on Arduino and I need some advise on it.
The idea of my Arduino Project is not the main point of this thread so I will just skipped that. The problem I have encountered is that:
I am using two 3.7V RECHARGEABLE Lithium battery to provide a 7.4V voltage supply to the board (Not directly to the board). What makes my head hurts is that how can I know / the board knows when the battery is charging? I know how to detect the battery level and display it on the screen. But how can I indicate the battery charging status on the screen? What pins should I use? Or maybe a transistor?
Any helps will be very much appreciated, thanks.