3.7 - 12V battery low-voltage indicator

Hello friends, today in this video i have shown how to make battery low voltage indicator circuit using Tl431. The circuit can be used in any battery 3.7v to 12v. At first the circuit needs to be calibrated by selecting the threshold voltage by adjusting the preset. This is a tl431 based precision low voltage indicator which can detect 0.02v change in battery. Normally the red led remains ON but when the battery voltage goes below threshold voltage the led goes OFF.
Components required for this project:-

TL431
3 x 1K resistor
10K potentiometer
220 ohm resistor
led

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Видео 3.7 - 12V battery low-voltage indicator канала Tech Ideas