Battery voltage indication circuit
Source: InternetPublisher:同住地球村 Keywords: Battery voltage LED voltage drop Updated: 2020/03/22
Battery voltage indication circuit
This circuit can be used to change the display state. If a transistor is added to the ③ pin to drive the LED , the battery will have normal voltage.
The LED does not light up, but when the battery voltage drops to a critical value, the LED starts to flash. The indicating circuit is as shown in the figure.
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