This circuit indicates the remaining battery life bAy varying the duty cycle and flash rate of an LED as the battery voltage decreases. In fact, the circuit actually indicates five battery conditions: ...

The following circuit uses a low-power CMOS comparator and an LED to indicate low-battery voltage without causing excessive current drain. To view the application note, click on the URL below.

John Paul, AAA Northeast's Car Doctor, hears from a reader getting a low-battery warning on a car that always starts right up. The Car Doctor hears from a reader getting a low-battery warning on a car ...

Most drivers expect their car to start without hesitation, but the battery behind that reliability does not last forever. On average, a standard car battery lasts about three to five years, while ...

Here is the circuit diagram of low battery indicator from silicon chip electronics. This simple circuit lights LED1 when the battery voltage drops below the setting set by trimpot VR1. In effect, VR1 ...