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THREE VOLT LOW BATTERY
VOLTAGE FLASHER
This circuit is designed to monitor two alkaline cells (3v) that form the battery often
used in portable electronic equipment. It use an inexpensive IC from Panasonic that
is connected to an efficient LED flashing circuit. When the battery voltage drops
below a certain point the circuit flashes the LED. In the off state the circuit
draws only 1uA, while in the active flashing state it draws 20uA. Published in
EDN, Jan 2, 1997 |
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Click on Drawing
Below to view PDF version of Schematic |
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