12V Battery Level Monitor

LM3914 IC is the IC used in this circuit. This IC is also called as dot display driver or bar display driver. It has the ability to sense the magnitude of input analogue signals and able to drives up to 10 LEDs at a time. There are two modes of displays we can choose; dot or bar, depends upon the purpose. Pin 9 is connected with power supply and it tends to get a graph output else IC gives dot display.

We can use LM3914 IC to monitor 12V battery level. The power supply needed for this circuit will get from the input battery itself. LED D1 to D10 will show the level of battery. By using very simple components, we can easily monitor the battery level with this IC.

1.IC LM39141
3.Resistor 56KΩ
Resistor 18KΩ
Resistor 4.7KΩ
4.Variable Resistor 10 KΩ1

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