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Best 12v battery level indicator circuit|12v battery charge level indicator


This post is about a battery level indicator or battery monitor circuit that can be implemented in some DIY projects where battery monitoring is essential.

the circuit consists of major components like

Bridge diode:

used to make a non-polarised input for the circuit which means you can connect the circuit to the battery in any direction


The resistors are used in this circuit to reduce the current flowing to the led so that it won’t get burnt

LEDs :

They are the indicators that will show the voltage input level

Zener diodes

they are used to turn on each of the led anytime the input voltage reaches the Zener diode threshold volt

A capacitor

It is used for filtering the VCC voltage of the circuit

The basics of a 12v battery level indicator circuit

A battery level indicator circuit is a simple way to monitor the state of a battery. The circuit consists of a voltage regulator and a light-emitting diode (LED). When the battery voltage reaches a set level, the LED turns on. This simple circuit is perfect for applications where you need to know the state of a battery, but don’t need to control the battery’s power levels.

Diagram of the circuit

Testing the circuit in a video below


The battery level indicator or battery monitor circuit can be used in DIY projects like DIY inverter projects, DIY battery chargers e.t.c

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