The simple 12V battery status indicator is a circuit that shows the battery state only by flashing LEDs. For example, if out of 10 six LEDs are glowing it means 60 percent of the battery power is left. When the battery is fully charged the circuit LEDs will turn on, and the LEDs will turn off one by one as the battery runs down.
Hardware Components
The following components are required to make a 12V Battery Indicator Circuit
| S.no | Component | Value | Qty |
|---|---|---|---|
| 1. | Resistors | (220, 180, 150, 100) ohms | 1,1,1,1 |
| 2. | LED | – | 4 |
| 3. | Zener Diode | 8.2V, 9.1V, 10V, 11V | 1,1,1,1 |
| 4. | Battery | 12V | 1 |
12V Battery Indicator Circuit
Working Explanation
In a simple 12 Volt, battery status indicator circuit each LED will close on the different voltage that is also labeled on the upper side of the circuit diagram. Once the 12 Volt battery is completely charged it will light up to 13 volts such that all the circuit LEDs will glow on this level. So once the battery drops down to 12.6 Volt the LED 4 would go off showing that the battery’s total voltage is 12.6 volt. Similar to where the battery voltage runs down to 11.6 volts as described above on the circuit the LED 3 is disabled and signals that the battery voltage is 11.6 Volt and soon.
Applications and Uses
- The simple 12V battery status indicator can be used to calculate the car battery level.
- This circuit helps to calibrate the state of the inverter.
