I want to make a simple project, because i am facing a lil problem regarding charging system of battery… i am using GPS Tracking system in motorbike the system has a built in 3.7V 800mah battery and timing of fully charged is 12hr it comes with a charger.The problem is that i want to tun the Tracking system ‘on’ permanently. I attached the charger with 12v Motorbike battery permanently but the bike battery discharge within a 2 days if i don’t use it…
i want to make a circuit which check the battery voltage of Tracking system battery if the battery voltage is less the 3.3 then turn the relay ‘on’ and if the battery voltage is 4.2 or grater then relay will be turn ‘off’ … then i use this relay with bike battery and charger connection so the charger is only turn on when the Tracking battery voltage going less then 3.3V.
I need help to make this project… how i start it?..
my logic i this…
i don’t know how the voltage is sensed by arduino…?