THREE VOLT LOW BATTERY VOLTAGE FLASHER | | |
http://www.discovercircuits.com/DJ-Circuits/undervol.htm
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.
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