12 Volt Battery Level Indicator Circuit Diagram. The nominal terminal voltage of a lead acid battery is 13 8 volts and that of a tubular battery is 14 8 volts when fully charged. D1 is the voltage reference zener.
The lm3914 can sense voltage levels and can drive a display of 10 leds in dot mode or bar mode. The terminal voltage of the battery is indicated through a four level led indicators. This circuit works very well with any kind of 12 volt batteries i mean however your battery amp is low or high doesn t matter.
05 11 2018 05 11 2018 aamis 0 comments 12 battery level indicator circuit diagram using lm3914 12v battery level indicator circuit led bar graph 3 7v battery level indicator circuit 48 volt battery level indicator circuit 48v battery level indicator circuit battery full charge indicator circuit battery level indicator project pdf.
The heart of this circuit is the lm3914 from national semiconductors. Simple 12 volt battery full charge indicator circuit diagram or 12v car battery status monitor circuit indicating voltage more than 12 75v dc. R7 8 form a voltage divider to that reduces the battery voltage by a factor of 3. The lm3914 can sense voltage levels and can drive a display of 10 leds in dot mode or bar mode.
